Source Mailchimp: update documentation

[annalvova05]

What

Close #11347

How

Update documentation

Recommended reading order

1. spec.json
2. mailchimp.md

🚨 User Impact 🚨

Are there any breaking changes? What is the end result perceived by the user? If yes, please merge this PR with the 🚨🚨 emoji so changelog authors can further highlight this if needed.

Pre-merge Checklist

Expand the relevant checklist and delete the others.

Updating a connector

Community member or Airbyter

• Grant edit access to maintainers (instructions)
• Secrets in the connector's spec are annotated with airbyte_secret
• Unit & integration tests added and passing. Community members, please provide proof of success locally e.g: screenshot or copy-paste unit, integration, and acceptance test output. To run acceptance tests for a Python connector, follow instructions in the README. For java connectors run ./gradlew :airbyte-integrations:connectors:<name>:integrationTest.
• Code reviews completed
• Documentation updated
  • Connector's README.md
  • Connector's bootstrap.md. See description and examples
  • Changelog updated in docs/integrations/<source or destination>/<name>.md including changelog. See changelog example
• PR name follows PR naming conventions

Airbyter

If this is a community PR, the Airbyte engineer reviewing this PR is responsible for the below items.

• Create a non-forked branch based on this PR and test the below items on it
• Build is successful
• If new credentials are required for use in CI, add them to GSM. Instructions.
• /test connector=connectors/<name> command is passing
• New Connector version released on Dockerhub by running the /publish command described here
• After the new connector version is published, connector version bumped in the seed directory as described here
• Seed specs have been re-generated by building the platform and committing the changes to the seed spec files, as described here

Tests

Unit

Put your unit tests output here.

Integration

Put your integration tests output here.

Acceptance

Put your acceptance tests output here.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@1f2fdae). Click here to learn what that means.
The diff coverage is n/a.

❗ Current head 742b78f differs from pull request most recent head 73ec29f. Consider uploading reports for the commit 73ec29f to get more accurate results

@@            Coverage Diff            @@
##             master   #11352   +/-   ##
=========================================
  Coverage          ?   94.66%           
=========================================
  Files             ?        3           
  Lines             ?      150           
  Branches          ?        0           
=========================================
  Hits              ?      142           
  Misses            ?        8           
  Partials          ?        0           

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[misteryeo]

Added a few comments and feedback.

FYI @andyjih

[annalvova05]

/test connector=connectors/source-mailchimp

🕑 connectors/source-mailchimp https://github.com/airbytehq/airbyte/actions/runs/2201354549
✅ connectors/source-mailchimp https://github.com/airbytehq/airbyte/actions/runs/2201354549
Python tests coverage:

Name                                                 Stmts   Miss  Cover
------------------------------------------------------------------------
source_acceptance_test/utils/__init__.py                 6      0   100%
source_acceptance_test/tests/__init__.py                 4      0   100%
source_acceptance_test/__init__.py                       2      0   100%
source_acceptance_test/tests/test_full_refresh.py       52      2    96%
source_acceptance_test/utils/asserts.py                 37      2    95%
source_acceptance_test/config.py                        74      6    92%
source_acceptance_test/utils/json_schema_helper.py     105     13    88%
source_acceptance_test/utils/common.py                  80     17    79%
source_acceptance_test/utils/compare.py                 62     23    63%
source_acceptance_test/tests/test_core.py              285    106    63%
source_acceptance_test/base.py                          10      4    60%
source_acceptance_test/utils/connector_runner.py       110     48    56%
source_acceptance_test/tests/test_incremental.py        69     38    45%
------------------------------------------------------------------------
TOTAL                                                  896    259    71%
Name                           Stmts   Miss  Cover
--------------------------------------------------
source_mailchimp/__init__.py       2      0   100%
source_mailchimp/source.py        45      1    98%
source_mailchimp/streams.py      103      7    93%
--------------------------------------------------
TOTAL                            150      8    95%

Python short test summary info:

=========================== short test summary info ============================
SKIPPED [1] ../usr/local/lib/python3.9/site-packages/source_acceptance_test/plugin.py:56: Skipping TestIncremental.test_two_sequential_reads because not found in the config
================== 38 passed, 1 skipped in 722.32s (0:12:02) ===================

[annalvova05]

/publish connector=connectors/source-mailchimp

🕑 connectors/source-mailchimp https://github.com/airbytehq/airbyte/actions/runs/2201469798
❌ Failed to publish connectors/source-mailchimp
❌ Couldn't auto-bump version for connectors/source-mailchimp

[annalvova05]

/publish connector=connectors/source-mailchimp

🕑 connectors/source-mailchimp https://github.com/airbytehq/airbyte/actions/runs/2201537249
🚀 Successfully published connectors/source-mailchimp
🚀 Auto-bumped version for connectors/source-mailchimp
✅ connectors/source-mailchimp https://github.com/airbytehq/airbyte/actions/runs/2201537249