fix: pass MISE_GITHUB_TOKEN to CI build to avoid GitHub API rate limits

The mise tool manager hits GitHub API rate limits when installing tools
like trivy in CI. Pass the PROJEN_GITHUB_TOKEN as MISE_GITHUB_TOKEN so
mise can authenticate its API calls.

Author: MichaelWalker-git

.github/workflows/build.yml

@@ -81,6 +81,7 @@ const project = new awscdk.AwsCdkTypeScriptApp({
   buildWorkflowOptions: {
     env: {
       GITHUB_TOKEN: '${{ secrets.PROJEN_GITHUB_TOKEN }}',
+      MISE_GITHUB_TOKEN: '${{ secrets.PROJEN_GITHUB_TOKEN }}',
     },
   },
   gitignore: [