ci: skip windows 3.13 multiple os unit tests [backport 3.9] (#13698)

Backport 8594048 from #13666 to 3.9.

## Checklist
- [x] PR author has checked that all the criteria below are met
- The PR description includes an overview of the change
- The PR description articulates the motivation for the change
- The change includes tests OR the PR description describes a testing
strategy
- The PR description notes risks associated with the change, if any
- Newly-added code is easy to change
- The change follows the [library release note
guidelines](https://ddtrace.readthedocs.io/en/stable/releasenotes.html)
- The change includes or references documentation updates if necessary
- Backport labels are set (if
[applicable](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting))

## Reviewer Checklist
- [x] Reviewer has checked that all the criteria below are met 
- Title is accurate
- All changes are related to the pull request's stated goal
- Avoids breaking
[API](https://ddtrace.readthedocs.io/en/stable/versioning.html#interfaces)
changes
- Testing strategy adequately addresses listed risks
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- If necessary, author has acknowledged and discussed the performance
implications of this PR as reported in the benchmarks PR comment
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[release branch maintenance
policy](https://ddtrace.readthedocs.io/en/latest/contributing.html#backporting)

Co-authored-by: Brett Langdon <brett.langdon@datadoghq.com>

Author: github-actions[bot]

.github/workflows/unit_tests.yml

@@ -46,8 +46,10 @@ jobs:
           sudo apt-get install -y python3.13 python3.13-dev
 
       - name: Run tests
+        # Currently failing to build the project on Windows 3.13, but only for this job, "Build" workflow is successful
+        if: matrix.os != 'windows-latest' && matrix.python-version != '3.13'
         run: hatch run +py=${{ matrix.python-version }} multiple_os_tests:test
-  
+
   finished:
     name: Multiple OS Tests Finished
     runs-on: ubuntu-latest
@@ -58,4 +60,4 @@ jobs:
         run: exit 0
       - name: Fails if anything else failed
         if: needs.multiple_os_tests.result != 'success'
-        run: exit 1
+        run: exit 1