build(deps): bump the dependencies group across 1 directory with 2 updates (#496)

Bumps the dependencies group with 2 updates in the / directory: [GoogleCloudPlatform/functions-framework-conformance](https://github.com/googlecloudplatform/functions-framework-conformance) and [subosito/flutter-action](https://github.com/subosito/flutter-action).


Updates `GoogleCloudPlatform/functions-framework-conformance` from 1.8.6 to 1.8.7
- [Release notes](https://github.com/googlecloudplatform/functions-framework-conformance/releases)
- [Commits](GoogleCloudPlatform/functions-framework-conformance@v1.8.6...v1.8.7)

Updates `subosito/flutter-action` from 2.19.0 to 2.21.0
- [Release notes](https://github.com/subosito/flutter-action/releases)
- [Commits](subosito/flutter-action@e938fdf...fd55f4c)

---
updated-dependencies:
- dependency-name: GoogleCloudPlatform/functions-framework-conformance
  dependency-version: 1.8.7
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dependencies
- dependency-name: subosito/flutter-action
  dependency-version: 2.21.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>
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/[email protected].6
+      uses: GoogleCloudPlatform/functions-framework-conformance/[email protected].7
       with:
         functionType: 'http'
         useBuildpacks: false
@@ -49,7 +49,7 @@ jobs:
         startDelay: 3
 
     - name: Run CloudEvent conformance tests
-      uses: GoogleCloudPlatform/functions-framework-conformance/[email protected].6
+      uses: GoogleCloudPlatform/functions-framework-conformance/[email protected].7
       with:
         functionType: 'cloudevent'
         useBuildpacks: false

.github/workflows/lint.yml

@@ -401,7 +401,7 @@ jobs:
             os:ubuntu-latest;pub-cache-hosted
             os:ubuntu-latest
       - name: Setup Flutter SDK
-        uses: subosito/flutter-action@e938fdf56512cc96ef2f93601a5a40bde3801046
+        uses: subosito/flutter-action@fd55f4c5af5b953cc57a2be44cb082c8f6635e8e
         with:
           channel: stable
       - id: checkout