chore(deps): upgrade dependencies (#613)

Upgrades project dependencies. See details in [workflow run].

[Workflow Run]: https://github.com/cdklabs/cdk-monitoring-constructs/actions/runs/12458969299

------

*Automatically created by projen via the "upgrade-main" workflow*

Author: cdklabs-automation

.projen/deps.json

@@ -22,6 +22,8 @@ const project = new awscdk.AwsCdkConstructLibrary({
   stability: "experimental",
 
   cdkVersion: CDK_VERSION,
+  // TODO: upgrade to 5.x
+  jsiiVersion: "1.x",
 
   srcdir: "lib",
   testdir: "test",