chore: cdk-assets did not release (#687)

When we last bumped the cloud assembly schema version, `cdk-assets` did
not release, because it doesn't have a dependency on the cloud assembly
schema package we could track in projen.

Relates to aws/aws-cdk#34912.

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under the terms of the Apache-2.0 license

---------

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Co-authored-by: github-actions <github-actions@github.com>

Author: rix0rrr

.projenrc.ts

@@ -672,6 +672,10 @@ const cdkAssetsLib = configureProject(
 
     // Append a specific version string for testing
     nextVersionCommand: 'tsx ../../../projenrc/next-version.ts neverMajor maybeRc',
+
+    releasableCommits: transitiveFeaturesAndFixes('@aws-cdk/cdk-assets-lib', [
+      '@aws-cdk/cloud-assembly-schema',
+    ]),
   }),
 );
 
@@ -744,6 +748,11 @@ const cdkAssetsCli = configureProject(
 
     // Append a specific version string for testing
     nextVersionCommand: 'tsx ../../projenrc/next-version.ts maybeRc',
+
+    releasableCommits: transitiveFeaturesAndFixes('cdk-assets', [
+      '@aws-cdk/cdk-assets-lib',
+      '@aws-cdk/cloud-assembly-schema',
+    ]),
   }),
 );