Fixed parser.

.github/workflows/backend-tests.yml

@@ -80,7 +80,7 @@ jobs:
         # https://github.com/npm/cli/issues/2199
         run: >
              export ETHERPAD_PLUGINS="ep_align ep_author_hover ep_cursortrace ep_font_size ep_hash_auth ep_headings2 ep_image_upload ep_markdown ep_readonly_guest ep_set_title_on_pad ep_spellcheck ep_subscript_and_superscript ep_table_of_contents"
-             /bin/bash -c 'ARR_PLUGINS=($ETHERPAD_PLUGINS) && jq -n "{plugins: \$ARGS.positional}" --args ${ARR_PLUGINS[@]} > var/installed_plugins.json'; }
+             /bin/bash -c 'ARR_PLUGINS=($ETHERPAD_PLUGINS) && jq -n "{plugins: \$ARGS.positional}" --args ${ARR_PLUGINS[@]} > var/installed_plugins.json'; }'
       # Etherpad core dependencies must be installed after installing the
       # plugin's dependencies, otherwise npm will try to hoist common
       # dependencies by removing them from src/node_modules and installing them