Upgrade golangci/golangci-lint-action v3 -> v8

Author: mostynb

.github/workflows/golangci-lint.yml

@@ -16,7 +16,8 @@ jobs:
           go-version: '1.24.5'
       - uses: actions/checkout@v4
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+        uses: golangci/golangci-lint-action@v8
         with:
           version: latest
           args: --timeout=10m
+          only-new-issues: true