Update .github/workflows/docs.yml

Co-authored-by: Alexander Samusev <41779041+alvicsam@users.noreply.github.com>

cumulus/.github/workflows/docs.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - name: Install tooling
         run: |
-          apt-get install -y protobuf
+          apt-get install -y protobuf-compiler
           protoc --version
 
       - name: Checkout repository