add dependabot config (#9)

.github/dependabot.yml

@@ -0,0 +1,20 @@
+version: 2
+
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    commit-message:
+      prefix: "gha"
+    pull-request-branch-name:
+      separator: "/"
+
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    commit-message:
+      prefix: "gomod"
+    pull-request-branch-name:
+      separator: "/"

.github/workflows/check.yml

@@ -14,7 +14,7 @@ jobs:
       - name: Set up Go
         uses: actions/setup-go@v2
         with:
-          go-version: '1.19.2'
+          go-version: '1.19.3'
         id: go
 
       - name: Check out code into the Go module directory