use makefile as go cache key

Author: abn

.github/workflows/main.yml

@@ -34,6 +34,7 @@ jobs:
       - uses: actions/setup-go@41dfa10bad2bb2ae585af6ee5bb4d7d973ad74ed # v5
         with:
           go-version: '^1.23.0'
+          cache-dependency-path: "Makefile"
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@0b93645e9fea7318ecaed2b359559ac225c90a2b # v5