[GHA workflow] do not run the release build on cron schedule for compnerd/swift-build (#704)

Author: hyp

.github/workflows/release-swift-toolchain-schedule.yml

@@ -3,8 +3,10 @@ name: Build release Swift toolchains
 on:
   workflow_dispatch:
   # Schedule to build a new release toolchain nightly.
-  schedule:
-    - cron: "10 0 * * */1"
+  # Note: This is disabled on compnerd/swift-build as the
+  # build times out when running the GitHub workflow in that repo.
+  # schedule:
+  #  - cron: "10 0 * * */1"
 
 jobs:
   # Each job builds a release toolchain for a specific Swift version.