ci: switch to drone-matrix plugin

.ansibledoctor

@@ -1,3 +0,0 @@
----
-exclude_files:
-  - molecule/

.drone.jsonnet

@@ -132,11 +132,11 @@ 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

@@ -122,7 +122,7 @@ clone:
 
 steps:
   - name: matrix
-  image: plugins/matrix
+    image: thegeeklab/drone-matrix
     settings:
       homeserver:
         from_secret: matrix_homeserver
@@ -130,7 +130,7 @@ 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
 
@@ -147,6 +147,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 7198dfd42197ae530b97e2d26765e5818efc5a1c73b2b95393344b9f77cb33a9
+hmac: 7223650263350e2d70725d822ec216f71e262c1319c60a9d490a07e1b7f5d345
 
 ...