chore: Adding missing sinks and sources to schema file

[matzew]

Fixes #

Proposed Changes

• as per title

Pre-review Checklist

• At least 80% unit test coverage
• E2E tests for any new behavior
• Docs PR for any user-facing impact
• Spec PR for any new API feature
• Conformance test for any change to the spec

Release Note

Docs

[matzew]

/assign @pierDipi
nit: just adding missing artifacts

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.

Project coverage is 62.99%. Comparing base (779992f) to head (ee028c1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
cmd/schema/main.go	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8460      +/-   ##
==========================================
- Coverage   63.02%   62.99%   -0.03%     
==========================================
  Files         394      394              
  Lines       23882    23887       +5     
==========================================
- Hits        15051    15048       -3     
- Misses       8028     8035       +7     
- Partials      803      804       +1     

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[pierDipi]

/lgtm
/approve

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: matzew, pierDipi

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