Bump arduino/setup-protoc from 1.1.2 to 1.2.0 (#353)

Bumps [arduino/setup-protoc](https://github.com/arduino/setup-protoc) from 1.1.2 to 1.2.0.
- [Release notes](https://github.com/arduino/setup-protoc/releases)
- [Commits](https://github.com/arduino/setup-protoc/compare/v1.1.2...v1.2.0)

---
updated-dependencies:
- dependency-name: arduino/setup-protoc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

.github/workflows/docs.yml

@@ -41,7 +41,7 @@ jobs:
           persist-credentials: false
 
       - name: Install last version of Protoc
-        uses: arduino/setup-protoc@v1.1.2
+        uses: arduino/setup-protoc@v1.2.0
         with:
           # TODO: increase to latest version after https://github.com/arduino/setup-protoc/issues/33 is fixed
           version: '3.20.1'