Remove APP_PROJECT_DIR from APP_SHARE_DIR in .env (#1483)

Author: nicolas-grekas

symfony/framework-bundle/7.4/manifest.json

@@ -15,7 +15,7 @@
     "env": {
         "APP_ENV": "dev",
         "APP_SECRET": "",
-        "APP_SHARE_DIR": "$APP_PROJECT_DIR/var/share"
+        "APP_SHARE_DIR": "%VAR_DIR%/share"
     },
     "dotenv": {
         "dev": {