ci: update staticcheck to v0.6.1

Author: marten-seemann

.github/workflows/lint.yml

@@ -45,7 +45,7 @@ jobs:
         run: go vet ./...
       - name: Install staticcheck
         if: success() || failure() # run this step even if the previous one failed
-        run: go install honnef.co/go/tools/cmd/staticcheck@v0.5.0
+        run: go install honnef.co/go/tools/cmd/staticcheck@v0.6.1
       - name: staticcheck
         if: success() || failure() # run this step even if the previous one failed
         working-directory: ${{ matrix.module }}