chore(deps): update actions/setup-go action to v6

Author: renovate-bot

.github/workflows/conformance.yaml

@@ -39,7 +39,7 @@ jobs:
         distribution: temurin
 
     - name: Setup Go
-      uses: actions/setup-go@f111f3307d8850f501ac008e886eec1fd1932a34 # v5.3.0
+      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
       with:
         go-version: '1.21'