Fix linter job configuration

Author: Paweł Rozynek

.github/workflows/lint.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v1
+        uses: golangci/golangci-lint-action@v2
         with:
-          version: v1.26
+          version: v1.29
           working-directory: emf