Bump com.squareup:kotlinpoet from 1.14.2 to 1.15.1 (#462)

Bumps [com.squareup:kotlinpoet](https://github.com/square/kotlinpoet) from 1.14.2 to 1.15.1.
- [Release notes](https://github.com/square/kotlinpoet/releases)
- [Changelog](https://github.com/square/kotlinpoet/blob/main/docs/changelog.md)
- [Commits](square/kotlinpoet@1.14.2...1.15.1)

---
updated-dependencies:
- dependency-name: com.squareup:kotlinpoet
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

compiler/build.gradle.kts

@@ -18,7 +18,7 @@ dependencies {
 
     // Misc
     implementation(kotlin("reflect"))
-    implementation("com.squareup:kotlinpoet:1.14.2")
+    implementation("com.squareup:kotlinpoet:1.15.1")
     implementation("com.google.truth:truth:1.1.5")
 
     // Testing