Forgejo Action: Run just check.

.forgejo/workflows/ci.yml

@@ -17,7 +17,6 @@ jobs:
       uses: https://github.com/dtolnay/rust-toolchain@stable
       with:
         toolchain: stable
-    - run: cargo install just
     
     - name: Install Node.js
       uses: actions/setup-node@v4
@@ -26,6 +25,9 @@ jobs:
         cache: 'npm'
         cache-dependency-path: 'frontend/package-lock.json'
     
+    - name: Install just
+      uses: https://github.com/extractions/setup-just@v3
+    
     - name: Install frontend dependencies
       run: |
         cd frontend