chore(deps): update actions/setup-go action to v6 (#38)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/golangci-lint.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version-file: go.mod
 

.github/workflows/unit-tests.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           # Reads version from go.mod; override with a specific version if you prefer
           go-version-file: go.mod