fix: data_migration dir name

.docker/app/Dockerfile

@@ -54,7 +54,7 @@ ADD .docker/app/config.docker.php ${SCRIPT_ROOT}
 COPY . ${SRC_DIR}
 
 ARG ORIGIN_REPO_EXPORT_IMPORT=https://gitlab.tt-rss.org/tt-rss/plugins/ttrss-data-migration.git
-RUN git clone --depth=1 ${ORIGIN_REPO_EXPORT_IMPORT} ${SRC_DIR}/plugins.local/ttrss-data-migration
+RUN git clone --depth=1 ${ORIGIN_REPO_EXPORT_IMPORT} ${SRC_DIR}/plugins.local/data_migration
 
 ARG ORIGIN_REPO_XACCEL=https://git.tt-rss.org/fox/ttrss-nginx-xaccel.git
 RUN git clone --depth=1 ${ORIGIN_REPO_XACCEL} ${SRC_DIR}/plugins.local/nginx_xaccel

.docker/app/startup.sh

@@ -58,8 +58,8 @@ if [ -z $SKIP_RSYNC_ON_STARTUP ]; then
 			$DST_DIR/plugins.local/mailer_smtp
 
 		sudo -u app rsync -a --no-owner --delete \
-			$SRC_DIR/plugins.local/ttrss-data-migration \
-			$DST_DIR/plugins.local/ttrss-data-migration
+			$SRC_DIR/plugins.local/data_migration \
+			$DST_DIR/plugins.local/data_migration
 	fi
 else
 	echo "warning: working copy in $DST_DIR won't be updated, make sure you know what you're doing."