Update .github/workflows/ci.yml

Co-authored-by: Elan Ruusamäe <glen@pld-linux.org>

Author: paragonie-scott

.github/workflows/ci.yml

@@ -99,7 +99,7 @@ jobs:
           memory_limit: 256M
 
       - name: Install Psalm
-        if: contains(['7.4', '8.0], ${{ matrix.php-version }})
+        if: contains(['7.4', '8.0'], ${{ matrix.php-version }})
         run: composer require --dev vimeo/psalm:^4
 
       - name: Static Analysis