Change fragment metadata count from 25 to 10

[niyatim23]

Issue #, if available:

What was changed?

• Modified MAX_FRAGMENT_METADATA_COUNT to 10
• Modified actions/checkout@v2 to v4
• Moved from macos-11 to macos-12 as the former has been deprecated

Why was it changed?

• Changed because that is the limit from the backend
• v2 is an older version and v4 is the latest

How was it changed?

• Updated the MAX_FRAGMENT_METADATA_COUNT
• Updated the ci.yml

What testing was done for the changes?

• The CI tests cover this change

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[sirknightj]

https://docs.aws.amazon.com/kinesisvideostreams/latest/dg/limits.html#limits-streaming-metadata

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.36%. Comparing base (bb74264) to head (f883163).

❗ Current head f883163 differs from pull request most recent head f24ea54. Consider uploading reports for the commit f24ea54 to get more accurate results

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #251   +/-   ##
========================================
  Coverage    80.36%   80.36%           
========================================
  Files           53       53           
  Lines        10826    10826           
========================================
  Hits          8700     8700           
  Misses        2126     2126           

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[hassanctech]

lgtm