[DOCS] update checkpoint snippet location

[klavavej]

This issueless PR updates the documented location of the "generate snippet" button since we're deferring adding it to the Expectations tab

@netlify /docs/cloud/connect/connect_airflow

• Description of PR changes above includes a link to an existing GitHub issue
• PR title is prefixed with one of: [BUGFIX], [FEATURE], [DOCS], [MAINTENANCE], [CONTRIB]
• Code is linted - run invoke lint (uses ruff format + ruff check)
• Appropriate tests and docs have been updated

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.69%. Comparing base (1220a18) to head (067b097).
Report is 2 commits behind head on develop.

✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop   #10854   +/-   ##
========================================
  Coverage    80.69%   80.69%           
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  Files          465      465           
  Lines        40493    40493           
========================================
  Hits         32676    32676           
  Misses        7817     7817           

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