Fix for cleaning main-devel assets (#7302)

Author: ssheorey

.github/workflows/update-release.yml

@@ -1,6 +1,7 @@
 name: Clean release
 permissions: {}
 on:
+  workflow_dispatch:
   workflow_run:  # Triggered when long running macos workflow ends
     workflows: [macos]
     types: [completed]
@@ -20,7 +21,7 @@ jobs:
           # Total assets from each main branch commmit:
           # Python wheels (4x4) + Viewer (3) + C++ libs (4+2+2) = 27,
           release_assets=($(gh release view main-devel --json assets --jq '.assets[] | .name'))
-          last_shas=($(git log --pretty=format:%h --abbrev-commit -n 3))
+          last_shas=($(git log -b origin/main --pretty=format:%h --abbrev-commit -n 3))
           echo "Removing release assets except from last 3 commits: ${last_shas[@]}"
           for relass in "${release_assets[@]}"; do
               found=false