Bump org.springframework.cloud.fn:spring-functions-catalog-bom

Bumps [org.springframework.cloud.fn:spring-functions-catalog-bom](https://github.com/spring-cloud/spring-functions-catalog) from 5.0.2-SNAPSHOT to 5.0.3-SNAPSHOT.
- [Release notes](https://github.com/spring-cloud/spring-functions-catalog/releases)
- [Commits](https://github.com/spring-cloud/spring-functions-catalog/commits)

---
updated-dependencies:
- dependency-name: org.springframework.cloud.fn:spring-functions-catalog-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

samples/zip-split-rabbit-binder/build.gradle

@@ -20,7 +20,7 @@ repositories {
 
 ext {
 	springCloudVersion = '2023.0.4'
-	springFunctionsCatalogVersion = '5.0.2-SNAPSHOT'
+	springFunctionsCatalogVersion = '5.0.3-SNAPSHOT'
 }
 
 dependencyManagement {