ci: pin datadog-ci for junit upload (#8078)

Author: juan-fernandez

.github/actions/push_to_test_optimization/action.yml

@@ -17,4 +17,7 @@ runs:
       uses: DataDog/junit-upload-github-action@24449d01fc01e721fa36ccd2caa3caae6922f0e8 # v3.0.0
       with:
         api_key: ${{ inputs.dd_api_key }}
+        # TODO: remove once https://github.com/DataDog/junit-upload-github-action/pull/54 lands
+        # and junit-upload-github-action releases are tied to datadog-ci releases.
+        datadog-ci-version: 5.13.1
         service: dd-trace-js-tests

.github/workflows/platform.yml

@@ -78,6 +78,9 @@ jobs:
         if: always() && github.actor != 'dependabot[bot]'
         with:
           api_key: ${{ steps.dd-sts.outputs.api_key }}
+          # TODO: remove once https://github.com/DataDog/junit-upload-github-action/pull/54 lands
+          # and junit-upload-github-action releases are tied to datadog-ci releases.
+          datadog-ci-version: 5.13.1
           service: dd-trace-js-tests
 
   core: