Bump com.squareup:kotlinpoet from 1.15.1 to 1.15.3

Bumps [com.squareup:kotlinpoet](https://github.com/square/kotlinpoet) from 1.15.1 to 1.15.3.
- [Release notes](https://github.com/square/kotlinpoet/releases)
- [Changelog](https://github.com/square/kotlinpoet/blob/main/docs/changelog.md)
- [Commits](square/kotlinpoet@1.15.1...1.15.3)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -18,7 +18,7 @@ grpc-netty = { group = "io.grpc", name = "grpc-netty", version = "1.60.0" }
 grpc-okhttp = { group = "io.grpc", name = "grpc-okhttp", version = "1.60.0" }
 grpc-testing = { group = "io.grpc", name = "grpc-testing", version = "1.60.0" }
 grpc-stub = { group = "io.grpc", name = "grpc-stub", version = "1.60.0" }
-kotlinpoet = { group = "com.squareup", name = "kotlinpoet", version = "1.15.1" }
+kotlinpoet = { group = "com.squareup", name = "kotlinpoet", version = "1.15.3" }
 junit = { group = "junit", name = "junit", version = "4.13.2" }
 junit-platform-launcher = { group = "org.junit.platform", name = "junit-platform-launcher", version = "1.10.1" }
 guava = { group = "com.google.guava", name = "guava", version = "32.1.3-jre" }