ci: switch to drone-matrix plugin

.drone.jsonnet

@@ -98,11 +98,11 @@ local PipelineNotification = {
   steps: [
     {
       name: 'matrix',
-      image: 'plugins/matrix',
+      image: 'thegeeklab/drone-matrix',
       settings: {
         homeserver: { from_secret: 'matrix_homeserver' },
         roomid: { from_secret: 'matrix_roomid' },
-        template: 'Status: **{{ build.status }}**<br/> Build: [{{ repo.Owner }}/{{ repo.Name }}]({{ build.link }}) ({{ build.branch }}) by {{ build.author }}<br/> Message: {{ build.message }}',
+        template: 'Status: **{{ build.Status }}**<br/> Build: [{{ repo.Owner }}/{{ repo.Name }}]({{ build.Link }}){{#if build.Branch}} ({{ build.Branch }}){{/if}} by {{ commit.Author }}<br/> Message: {{ commit.Message.Title }}',
         username: { from_secret: 'matrix_username' },
         password: { from_secret: 'matrix_password' },
       },

.drone.yml

@@ -7,12 +7,12 @@ platform:
   arch: amd64
 
 steps:
-- name: ansible-later
+  - name: ansible-later
     image: thegeeklab/ansible-later
     commands:
       - ansible-later
 
-- name: python-format
+  - name: python-format
     image: python:3.9
     commands:
       - pip install -qq yapf
@@ -20,7 +20,7 @@ steps:
     environment:
       PY_COLORS: 1
 
-- name: python-flake8
+  - name: python-flake8
     image: python:3.9
     commands:
       - pip install -qq flake8
@@ -43,7 +43,7 @@ platform:
   arch: amd64
 
 steps:
-- name: generate
+  - name: generate
     image: thegeeklab/ansible-doctor
     environment:
       ANSIBLE_DOCTOR_EXCLUDE_FILES: molecule/
@@ -53,7 +53,7 @@ steps:
       ANSIBLE_DOCTOR_ROLE_NAME: ${DRONE_REPO_NAME#*.}
       ANSIBLE_DOCTOR_TEMPLATE: hugo-book
 
-- name: publish
+  - name: publish
     image: plugins/gh-pages
     settings:
       netrc_machine: gitea.rknet.org
@@ -75,7 +75,7 @@ trigger:
     - refs/pull/**
 
 depends_on:
-- linting
+  - linting
 
 ---
 kind: pipeline
@@ -89,8 +89,8 @@ clone:
   disable: true
 
 steps:
-- name: matrix
-  image: plugins/matrix
+  - name: matrix
+    image: thegeeklab/drone-matrix
     settings:
       homeserver:
         from_secret: matrix_homeserver
@@ -98,7 +98,7 @@ steps:
         from_secret: matrix_password
       roomid:
         from_secret: matrix_roomid
-    template: "Status: **{{ build.status }}**<br/> Build: [{{ repo.Owner }}/{{ repo.Name }}]({{ build.link }}) ({{ build.branch }}) by {{ build.author }}<br/> Message: {{ build.message }}"
+      template: "Status: **{{ build.Status }}**<br/> Build: [{{ repo.Owner }}/{{ repo.Name }}]({{ build.Link }}){{#if build.Branch}} ({{ build.Branch }}){{/if}} by {{ commit.Author }}<br/> Message: {{ commit.Message.Title }}"
       username:
         from_secret: matrix_username
 
@@ -111,10 +111,10 @@ trigger:
     - failure
 
 depends_on:
-- documentation
+  - documentation
 
 ---
 kind: signature
-hmac: de861be6f4889f596916bc6a736ffff371dfcd78e561744299d946b208f190ad
+hmac: d6a1a9254bae9800287ae15ded7dbe334498dadf8df00b6ec331ecec69f5d353
 
 ...