Fix bin-image workflow JSON parsing error

Update the crazy-max/.github reusable workflow to the latest version to fix
a JSON parsing error that occurs when PR metadata contains control characters
(like newlines in the PR body).

The previous version (d9a10e2) used actions/github-script@v7 which had an
issue where it embedded the GitHub event payload directly into a JavaScript
template literal containing JSON. When JSON.parse() encountered unescaped
control characters, it would fail with:
  SyntaxError: Bad control character in string literal in JSON at position...

The newer version (387d336) uses actions/github-script@v8 which handles JSON
serialization more properly, preventing these parsing errors.

Fixes the build failure seen in PR #654.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>
Signed-off-by: David Scott <[email protected]>

Author: djs55

.github/workflows/bin-image.yml

@@ -26,7 +26,7 @@ env:
   REPO_SLUG: moby/vpnkit-bin
 jobs:
   build:
-    uses: crazy-max/.github/.github/workflows/bake-distribute-mp.yml@d9a10e2737504a6e253f96e344cef684b0e00cb5
+    uses: crazy-max/.github/.github/workflows/bake-distribute-mp.yml@387d336cac5f20cba622a6b9a866a80ea4c2c575
     with:
       target: bin-image
       push: ${{ github.event_name != 'pull_request' && github.repository == 'moby/vpnkit' }}