chore(deps): update googlecloudplatform/functions-framework-conformance action to v1.8.7

Author: renovate-bot

.github/workflows/coverage.yaml

@@ -62,15 +62,15 @@ jobs:
         go-version: '^1.16'
 
     - name: Run Cloud Event conformance tests
-      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.6
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.7
       with:
         functionType: 'cloudevent'
         useBuildpacks: false
         validateMapping: true
         cmd: '${{runner.workspace}}/build/google/cloud/functions/integration_tests/cloud_event_conformance'
 
     - name: Run HTTP conformance tests
-      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.6
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.7
       with:
         functionType: 'http'
         useBuildpacks: false