github actions: fix tagging in bootstrap_archives.yml

Author: Leonid Pliushch

.github/workflows/bootstrap_archives.yml

@@ -50,7 +50,7 @@ jobs:
         id: get_tag
         run: |
           new_tag="bootstrap-$(date "+%Y.%m.%d")"
-          existing_tag_revision=$(git tag | grep "$new_tag" | cut -d- -f3 | cut -dr -f2)
+          existing_tag_revision=$(git tag | grep "$new_tag" | sort -r | head -n 1 | cut -d- -f3 | cut -dr -f2)
           if [ -n "$existing_tag_revision" ]; then
             tag_rev=$((existing_tag_revision + 1))
           else