Upgrade artifact upload GitHub Action to v7

Author: SteveDesmond-ca

.github/workflows/phar.yml

@@ -27,7 +27,7 @@ jobs:
         run: php -dphar.readonly=0 build.php
 
       - name: Upload build
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: libyear.phar
           path: dist/libyear.phar