Gitea mysql fix some typo's in the template. (#192)

stack/gitea-mariadb.yml

@@ -7,8 +7,8 @@ services:
       MYSQL_DATABASE: ${DATABASE_NAME}
       MYSQL_USER: ${DATABASE_USER}
       MYSQL_PASSWORD: ${DATABASE_PASSWORD}
-      PGID: ${PGID}
-      PUID: ${PUID}
+      PUID: ${USER_UID}
+      PGID: ${USER_GID}
       TZ: ${TZ}
     networks:
       - gitea-mariadb_network
@@ -26,8 +26,8 @@ services:
       GITEA__database__USER: ${DATABASE_USER}
       GITEA__database__PASSWD: ${DATABASE_PASSWORD}
       GITEA__database__NAME: ${DATABASE_NAME}
-      PGID: ${PGID}
-      PUID: ${PUID}
+      USER_UID: ${USER_UID}
+      USER_GID: ${USER_GID}
       TZ: ${TZ}
     networks:
       - gitea-mariadb_network