build(deps): bump GoogleCloudPlatform/functions-framework-conformance (#410)

Bumps [GoogleCloudPlatform/functions-framework-conformance](https://github.com/googlecloudplatform/functions-framework-conformance) from 1.8.1 to 1.8.3.
- [Release notes](https://github.com/googlecloudplatform/functions-framework-conformance/releases)
- [Commits](GoogleCloudPlatform/functions-framework-conformance@v1.8.1...v1.8.3)

---
updated-dependencies:
- dependency-name: GoogleCloudPlatform/functions-framework-conformance
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/conformance.yml

@@ -40,7 +40,7 @@ jobs:
       working-directory: integration_test
 
     - name: Run HTTP conformance tests
-      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.1
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.3
       with:
         functionType: 'http'
         useBuildpacks: false
@@ -49,7 +49,7 @@ jobs:
         startDelay: 3
 
     - name: Run CloudEvent conformance tests
-      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.1
+      uses: GoogleCloudPlatform/functions-framework-conformance/action@v1.8.3
       with:
         functionType: 'cloudevent'
         useBuildpacks: false