Fix experimental update channel and toast

.github/workflows/release.yml

@@ -608,6 +608,7 @@ jobs:
         shell: bash
         env:
           RELEASE_SCOPE: ${{ needs.prepare-release.outputs.release_scope }}
+          IS_PRERELEASE: ${{ needs.prepare-release.outputs.prerelease }}
         run: |
           set -euo pipefail
           shopt -s nullglob
@@ -630,6 +631,29 @@ jobs:
             fi
           done
 
+          if [ "$IS_PRERELEASE" = "true" ]; then
+            cp release-assets/windows-x64/latest.yml release-assets/windows-x64/beta.yml
+            cp release-assets/linux-x64/latest-linux.yml release-assets/linux-x64/beta-linux.yml
+            update_metadata=(
+              release-assets/windows-x64/beta.yml
+              release-assets/linux-x64/beta-linux.yml
+            )
+
+            if [ "$RELEASE_SCOPE" = "all" ]; then
+              cp release-assets/macos-merged/latest-mac.yml release-assets/macos-merged/beta-mac.yml
+              update_metadata+=(release-assets/macos-merged/beta-mac.yml)
+            fi
+          else
+            update_metadata=(
+              release-assets/windows-x64/latest.yml
+              release-assets/linux-x64/latest-linux.yml
+            )
+
+            if [ "$RELEASE_SCOPE" = "all" ]; then
+              update_metadata+=(release-assets/macos-merged/latest-mac.yml)
+            fi
+          fi
+
           assets=(
             release-assets/windows-x64/*.exe
             release-assets/windows-x64/*.blockmap
@@ -648,16 +672,7 @@ jobs:
             )
           fi
 
-          assets+=(
-            release-assets/windows-x64/latest.yml
-            release-assets/linux-x64/latest-linux.yml
-          )
-
-          if [ "$RELEASE_SCOPE" = "all" ]; then
-            assets+=(
-              release-assets/macos-merged/latest-mac.yml
-            )
-          fi
+          assets+=("${update_metadata[@]}")
 
           if [ ${#assets[@]} -eq 0 ]; then
             echo "No release assets found to checksum."