ci: switch to drone-matrix plugin

.drone.yml

@@ -98,7 +98,7 @@ platform:
 
 steps:
   - name: matrix
-  image: plugins/matrix
+    image: thegeeklab/drone-matrix
     settings:
       homeserver:
         from_secret: matrix_homeserver
@@ -106,9 +106,13 @@ 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 }}) ({{ build.Branch }}) by {{ commit.Author }}<br/> Message: {{ commit.Message }}"
       username:
         from_secret: matrix_username
+    when:
+      status:
+        - success
+        - failure
 
 trigger:
   ref:
@@ -123,6 +127,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: 435256421217bc48a6dc985b5fe5e0109ce3a4ada42a9fcda68a07413091d48f
+hmac: cc31ad6165869f1516a7201966330197cdd92b0e698a040d92ae7dafa8ddf3b3
 
 ...