CI broken after upgrading setup-protoc

**Describe the bug**

CI pipelines are broken now with failure on "Install Protoc":

```
Run arduino/setup-protoc@v2
Error: Error: unable to get latest version
```


**To Reproduce**
Steps to reproduce the behavior:

**Expected behavior**
A clear and concise description of what you expected to happen.

**Additional context**
Add any other context about the problem here.
