ci: add matrix notify step, fix ssh key id

.drone.yml

@@ -39,7 +39,7 @@ steps:
         from_secret: private_ssh_key
       MANTA_USER: pub_solar
       MANTA_URL: https://eu-central.manta.greenbaum.cloud
-      MANTA_KEY_ID: "02:ae:79:2b:8f:7f:51:ba:c6:3c:ea:6f:f7:bb:d1:6a"
+      MANTA_KEY_ID: "46:9c:73:9d:66:c2:eb:fb:04:06:77:b6:0b:56:eb:aa"
     commands:
       - export TARGET_DIR="$${DRONE_REPO}/$${DRONE_BUILD_NUMBER}"
       - echo env var TARGET_DIR is set to $$TARGET_DIR
@@ -61,6 +61,28 @@ kind: pipeline
 type: docker
 name: Publish ISO
 
+steps:
+  - name: "Notify matrix"
+    image: plugins/matrix
+    settings:
+      homeserver: https://matrix.pub.solar
+      roomid: dfQBqwkhIzrFjMSsxy:pub.solar
+      username:
+        from_secret: matrix_username
+      password:
+        from_secret: matrix_password
+      template: "Test run status: {{ build.status }}, artifacts uploaded to Manta: https://eu-central.manta.greenbaum.cloud/pub_solar/public/{{ repo.Owner }}/{{ repo.Name }}/{{ build.number }}"
+
+trigger:
+  ref:
+    - refs/tags/v*
+    - refs/tags/t*
+
+---
+kind: pipeline
+type: docker
+name: Publish ISO
+
 steps:
   - name: "Build ISO"
     image: docker.nix-community.org/nixpkgs/nix-flakes:latest
@@ -114,6 +136,6 @@ data: cSWd6rIg8Z51hD+KMenYPX669qb6PWdh9V80Z1YpED68Ffoy73tWEoBjEs2pKUJpcL8qGxMjj5
 
 ---
 kind: signature
-hmac: 82e3f3690bafae2ff1962ebc24504275dba0dbca707e14b2a389b31a9f7b57c0
+hmac: f464c2c5e06f243d7e4176288d3d3db47c4b5285e4395dd8a2540441cac32445
 
 ...