ci: update release-please-action to v4 (#825)

.github/release-please-config.json

@@ -0,0 +1,12 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "bootstrap-sha": "b6d42a6fbda9c0083a49ddb5d65a754274d52ccc",
+  "include-component-in-tag": false,
+  "include-v-in-tag": true,
+  "packages": {
+    ".": {
+      "release-type": "go",
+      "package-name": "terraform-provider-hcloud"
+    }
+  }
+}

.github/release-please-manifest.json

@@ -0,0 +1 @@
+{".":"1.44.1"}

.github/workflows/release-please.yml

@@ -1,18 +1,18 @@
+name: Release-please
+
 on:
   push:
-    branches:
-      - main
-name: release-please
+    branches: [main]
 
 jobs:
   release-please:
-    # The secret HCLOUD_BOT_TOKEN is only available on the main repo, not in forks.
+    # Do not run on forks.
     if: github.repository == 'hetznercloud/terraform-provider-hcloud'
 
     runs-on: ubuntu-latest
     steps:
-      - uses: google-github-actions/release-please-action@v3
+      - uses: google-github-actions/release-please-action@v4
         with:
           token: ${{ secrets.HCLOUD_BOT_TOKEN }}
-          release-type: go
-          package-name: terraform-provider-hcloud
+          config-file: .github/release-please-config.json
+          manifest-file: .github/release-please-manifest.json