Changed Intall protoc step to only install if not already avaiable

Idea is to have this dep already in the runner image, but not break github hosted runner compatibility.

.github/workflows/ci.yaml

@@ -35,7 +35,10 @@ jobs:
       - uses: actions-rust-lang/setup-rust-toolchain@v1
 
       - name: Install protoc
-        run: sudo apt-get install protobuf-compiler
+        run: |  
+          if ! command -v protoc &> /dev/null; then
+             sudo apt-get install -y protobuf-compiler  
+          fi
 
       - name: Cargo cache
         uses: Swatinem/rust-cache@v2