Bump armeria-bom from 1.20.2 to 1.20.3 (#4936)

Bumps [armeria-bom](https://github.com/line/armeria) from 1.20.2 to 1.20.3.
- [Release notes](https://github.com/line/armeria/releases)
- [Changelog](https://github.com/line/armeria/blob/master/.post-release-msg)
- [Commits](line/armeria@armeria-1.20.2...armeria-1.20.3)

---
updated-dependencies:
- dependency-name: com.linecorp.armeria:armeria-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

Author: dependabot[bot]

dependencyManagement/build.gradle.kts

@@ -15,7 +15,7 @@ val DEPENDENCY_BOMS = listOf(
   "com.fasterxml.jackson:jackson-bom:2.14.0",
   "com.google.guava:guava-bom:31.1-jre",
   "com.google.protobuf:protobuf-bom:3.21.9",
-  "com.linecorp.armeria:armeria-bom:1.20.2",
+  "com.linecorp.armeria:armeria-bom:1.20.3",
   "com.squareup.okhttp3:okhttp-bom:4.10.0",
   "io.grpc:grpc-bom:1.50.2",
   "io.zipkin.brave:brave-bom:5.14.1",