Actions: fix paths

Author: cassidyjames

.github/workflows/lint.yml

@@ -1,6 +1,8 @@
 name: Lint
 on:
   pull_request:
+    paths:
+    - '**.vala'
 
 jobs:
   lint:

build-aux/flatpak/com.cassidyjames.plausible.json

@@ -18,7 +18,7 @@
       "sources": [
         {
           "type": "dir",
-          "path": "."
+          "path": "../.."
         }
       ]
     }