chore: split golangci-lint from go github action

.github/workflows/go.yaml

@@ -33,11 +33,3 @@ jobs:
         with:
           go-version: "~1.17"
       - run: go build ./cmd/changeloguru
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - uses: golangci/golangci-lint-action@v2
-        with:
-          version: latest

.github/workflows/golangci-lint.yaml

@@ -0,0 +1,19 @@
+name: Go
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  lint:
+    name: golangci-lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest