Update protobuf.yml

Author: markus-wa

.github/workflows/protobuf.yml

@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v2
       - name: Download latest Protobufs
         run: |
-          git clone https://github.com/SteamDatabase/GameTracking-CSGO.git $GameTracking_dir
+          git clone --depth=1 https://github.com/SteamDatabase/GameTracking-CSGO.git $GameTracking_dir
           cp $GameTracking_dir/Protobufs/{cstrike15_*.proto,engine_gcmessages.proto,netmessages.proto,steammessages.proto} pkg/demoinfocs/msg/proto
 
           if [[ ! `git status --porcelain` ]]; then