Update field names and descriptions

Author: ryanjbaxter

.github/workflows/release-train-ready.yml

@@ -36,11 +36,11 @@ on:
         required: true
         type: string
       spring-cloud-release-train-version:
-        description: 'Release train version matching the jenkins-releaser-config properties file (e.g. 2025.0.0)'
+        description: 'Spring Cloud release train version matching the jenkins-releaser-config properties file (e.g. 2025.0.0)'
         required: true
         type: string
       spring-release-train-version:
-        description: 'Release train version to mark this project ready in (e.g. 2025.0.0)'
+        description: 'Spring release train version to mark this project ready in (e.g. 2026.1)'
         required: true
         type: string
     secrets: