gpu-dawn: CI: prevent infinite loop of build -> release -> build -> release

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu-dawn/.github/workflows/ci.yml

@@ -7,6 +7,7 @@ on:
 jobs:
   # TODO(build-system): enable x86 Linux CI here, dependency cycle in build.zig
   # x86_64-linux:
+  #   if: ${{ !contains(github.event.head_commit.message, 'update to latest binary release') }}
   #   runs-on: ubuntu-latest
   #   # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
   #   # to the branch.
@@ -40,6 +41,7 @@ jobs:
   #         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
   # TODO(build-system): enable windows CI here once gpu-dawn builds under Windows
   # x86_64-windows:
+  #   if: ${{ !contains(github.event.head_commit.message, 'update to latest binary release') }}
   #   runs-on: windows-latest
   #   # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
   #   # to the branch.
@@ -59,6 +61,7 @@ jobs:
   #       run: zig build install -Dfrom-source=true
   #     # TODO: upload step for Windows
   x86_64-macos:
+    if: ${{ !contains(github.event.head_commit.message, 'update to latest binary release') }}
     runs-on: macos-latest
     # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
     # to the branch.

gpu-dawn/.github/workflows/m1_ci.yml

@@ -6,6 +6,7 @@ on:
       - completed
 jobs:
   aarch64-macos:
+    if: ${{ !contains(github.event.head_commit.message, 'update to latest binary release') }}
     runs-on: [self-hosted, macOS, ARM64]
     defaults:
       run:

gpu-dawn/.github/workflows/publish_release.yml

@@ -6,6 +6,7 @@ on:
       - completed
 jobs:
   publish:
+    if: ${{ !contains(github.event.head_commit.message, 'update to latest binary release') }}
     runs-on: ubuntu-latest
     steps:
     - name: Checkout