v13: add OAI-PMH percolator index clean-up to upgrade recipe

Author: slint

docs/releases/v13/upgrade-v13.0.md

@@ -142,6 +142,8 @@ invenio shell $(find $(pipenv --venv)/lib/*/site-packages/invenio_app_rdm -name
 
 ```bash
 invenio index destroy --yes-i-know
+search_prefix=$(invenio shell -c "print(app.config['SEARCH_INDEX_PREFIX'])")
+invenio index delete --force --yes-i-know "${search_prefix}rdmrecords-records-record-v6.0.0-percolators"
 invenio index init
 # if you have records custom fields
 invenio rdm-records custom-fields init