Fix bug in autocomment workflow that removed index suffix from commands (#1919)

Author: paoloredis

.github/workflows/autocomment.yaml

@@ -50,7 +50,7 @@ jobs:
             -H "Authorization: Bearer ${GITHUB_TOKEN}" \
             $FILES_URL \
               | jq -r --arg prefix $BRANCH_NAME/ '.[] | select(((.filename | test("content/(?!.*embed).*\\.md")) and .status != "removed")) | ($prefix + .filename)' \
-              | sed -E -e 's|(^[^/]+/)([^/]+/)|\1|' -e 's|^|https://redis.io/docs/staging/|' -e 's|(_?index)?\.md||' \
+              | sed -E -e 's|(^[^/]+/)([^/]+/)|\1|' -e 's|^|https://redis.io/docs/staging/|' -e 's|\/(_?index)?\.md|\/|' \
               | sort \
               | uniq)