Bump bufbuild/buf-setup-action from 1.39.0 to 1.40.0 (#74)

Bumps [bufbuild/buf-setup-action](https://github.com/bufbuild/buf-setup-action) from 1.39.0 to 1.40.0.
- [Release notes](https://github.com/bufbuild/buf-setup-action/releases)
- [Commits](bufbuild/buf-setup-action@v1.39.0...v1.40.0)

---
updated-dependencies:
- dependency-name: bufbuild/buf-setup-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/lint_with_buf.yaml

@@ -48,7 +48,7 @@ jobs:
           
     - run: flutter pub get
 
-    - uses: bufbuild/buf-setup-action@v1.39.0
+    - uses: bufbuild/buf-setup-action@v1.40.0
       with:
         github_token: ${{ github.token }}