Update docker-compose.yml

Fix ENV entry

Author: JBlond

docker-compose.yml

@@ -11,7 +11,7 @@ services:
             - PHP_DISPLAY_ERRORS=1
             - PHP_MEMORY_LIMIT=2048M
             - PHP_MAX_EXECUTION_TIME=-1
-            - PHP_DATE_TIMEZONE = Europe/Berlin
+            - PHP_DATE_TIMEZONE=Europe/Berlin
             - XDEBUG_IDE_KEY=PHPSTORM
         ports:
             - "88:80"