ci: use git-action plugin to update docs branch (#9)

.drone.jsonnet

@@ -228,10 +228,15 @@ local PipelineDocs = {
       name: 'publish',
       image: 'plugins/gh-pages',
       settings: {
-        username: { from_secret: 'github_username' },
-        password: { from_secret: 'github_token' },
-        pages_directory: '_docs/',
-        target_branch: 'docs',
+        action: [
+          'pages',
+        ],
+        author_email: 'bot@thegeeklab.de',
+        author_name: 'thegeeklab-bot',
+        message: 'auto-update documentation',
+        branch: 'gh-pages',
+        pages_directory: 'docs/',
+        netrc_password: { from_secret: 'github_token' },
       },
       when: {
         ref: ['refs/heads/main'],

.drone.yml

@@ -343,12 +343,15 @@ steps:
   - name: publish
     image: plugins/gh-pages
     settings:
-      pages_directory: _docs/
-      password:
+      action:
+        - pages
+      author_email: bot@thegeeklab.de
+      author_name: thegeeklab-bot
+      branch: gh-pages
+      message: auto-update documentation
+      netrc_password:
         from_secret: github_token
-      target_branch: docs
-      username:
-        from_secret: github_username
+      pages_directory: docs/
     when:
       ref:
         - refs/heads/main
@@ -457,6 +460,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 7e8f9c0185f2416c4250a175458905fe516c706a9dd4b0d38c201b22bc5b1b3d
+hmac: 89079eef07225acb12f8eeab92f29de04b4a46340ba265b6a9c9bfc6c75c18aa
 
 ...