Add dependabot config for GH Actions

Author: martialblog

.github/dependabot.yml

@@ -6,3 +6,7 @@ updates:
     interval: weekly
     time: '10:00'
   open-pull-requests-limit: 10
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: monthly

.github/workflows/go.yml

@@ -13,12 +13,12 @@ jobs:
 
     steps:
       - name: Check out code into the Go module directory
-        uses: actions/checkout@v1
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0
 
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
         with:
           go-version: 1.18
 

.github/workflows/golangci-lint.yml

@@ -11,11 +11,11 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v4
 
       - uses: actions/checkout@v2
 
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v2
+        uses: golangci/golangci-lint-action@v3
         with:
           version: v1.51