gh: add protobuf-compiler to fix CI

Author: facchinm

.github/workflows/package_core.yml

@@ -20,7 +20,7 @@ jobs:
         working-directory: /opt
         run: |
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends git cmake wget python3-pip ninja-build ccache
+          sudo apt-get install -y --no-install-recommends git cmake wget python3-pip ninja-build ccache protobuf-compiler
 
       - uses: actions/checkout@v4
         with: