Add release-20231016 for triggering 2023 build

.github/workflows/release-20231016-update.yml

@@ -0,0 +1,15 @@
+name: Release 5.10 Toolchains
+
+on:
+  workflow_dispatch:
+
+jobs:
+  # Each job builds a release toolchain for a specific Swift version.
+  build-release-20231016:
+    # Note: GitHub requires the use of an 'owner/repo' path before the
+    # workflow file path when we want to use a workflow from another branch.
+    uses: thebrowsercompany/swift-build/.github/workflows/swift-toolchain.yml@hyp/20231016-update
+    secrets:
+      SYMBOL_SERVER_PAT: ${{ secrets.SYMBOL_SERVER_PAT }}
+      CERTIFICATE: ${{ secrets.CERTIFICATE }}
+      PASSPHRASE: ${{ secrets.PASSPHRASE }}