Python: add write token to report (#9980)

### Motivation and Context

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The coverage report write job did not have the right permissions yet.

### Description

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### Contribution Checklist

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- [x] The code builds clean without any errors or warnings
- [x] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [x] All unit tests pass, and I have added new tests where possible
- [x] I didn't break anyone 😄

.github/workflows/python-test-coverage-report.yml

@@ -6,6 +6,10 @@ on:
     types:
       - completed
 
+permissions:
+  contents: read
+  pull-requests: write
+
 jobs:
   python-test-coverage-report:
     runs-on: ubuntu-latest
@@ -37,6 +41,7 @@ jobs:
         id: coverageComment
         uses: MishaKav/pytest-coverage-comment@main
         with:
+          github-token: ${{ secrets.GH_ACTIONS_PR_WRITE }}
           issue-number: ${{ env.PR_NUMBER }}
           pytest-coverage-path: python/python-coverage.txt
           title: "Python Test Coverage Report"