Fix deprecated CI config

.woodpecker/check.yml

@@ -1,7 +1,7 @@
 labels:
   backend: local
 
-pipeline:
+steps:
 - name: flake check
   image: bash
   commands:
@@ -14,15 +14,15 @@ pipeline:
 
 - name: notify
   image: bash
-  secrets:
+  environment:
-  - source: matrix_roomid
+    ADDRESS:
-    target: room
+      from_secret: matrix_homeserver
-  - source: matrix_username
+    ROOM:
-    target: user
+      from_secret: matrix_roomid
-  - source: matrix_password
+    USER:
-    target: pass
+      from_secret: matrix_username
-  - source: matrix_homeserver
+    PASS:
-    target: address
+      from_secret: matrix_password
   commands:
   - nix run github:ambroisie/matrix-notifier
   when: