changed documentation url

[numphileo]

What

Changed the documentationUrl to the correct url.

How

Changed the URL to https://docs.airbyte.io/integrations/sources/google-search-console

Recommended reading order

1. There's just one edit - so only that one line in spec.json

Pre-merge Checklist

Expand the checklist which is relevant for this PR.

Connector checklist

• Issue acceptance criteria met
• PR name follows PR naming conventions
• Secrets are annotated with airbyte_secret in output spec
• Unit & integration tests added as appropriate (and are passing)
  • Community members: please provide proof of this succeeding locally e.g: screenshot or copy-paste 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.
• /test connector=connectors/<name> command as documented here is passing.
  • Community members can skip this, Airbyters will run this for you.
• Code reviews completed
• Credentials added to Github CI if needed and not already present. instructions for injecting secrets into CI.
• Documentation updated
  • README
  • CHANGELOG.md
  • Reference docs in the docs/integrations/ directory.
• Build is successful
• Connector version bumped like described here
• New Connector version released on Dockerhub by running the /publish command described here
• No major blockers
• PR merged into master branch
• Follow up tickets have been created
• Associated tickets have been closed & stakeholders notified

[davinchia]

Thanks @numphileo !