Update readme, release process for latest releases

Signed-off-by: Taeik Lim <[email protected]>

Author: acktsap

README.md

@@ -169,6 +169,9 @@ Java
 
 ## User Guide
 
+- 1.2.x
+    - [Korean](https://github.com/naver/spring-batch-plus/tree/main/doc/ko)
+    - [English](https://github.com/naver/spring-batch-plus/tree/main/doc/en)
 - 1.1.x
     - [Korean](https://github.com/naver/spring-batch-plus/tree/1.1.x/doc/ko)
     - [English](https://github.com/naver/spring-batch-plus/tree/1.1.x/doc/en)
@@ -184,7 +187,6 @@ Java
 ### Prerequisites
 
 - Jdk 17 or higher
-- Kotlin 1.5 or higher
 
 ### Build
 

RELEASE_PROCESS.md

@@ -4,7 +4,7 @@
 2. Make a release branch by `git switch -c release/va.b.c`.
 3. Make a prepare commit.
     - Remove `-SNAPSHOT` postfix of `gradle.properties`.
-    - Update compatibility, example, ... of `README.md`. Boot starter compatibility can be checked in [here](https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-dependencies/build.gradle).
+    - Update compatibility, example, user guide, ... of `README.md`. Boot starter compatibility can be checked in [here](https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-dependencies/build.gradle).
     - Update [CHANGELOG](./CHANGELOG.md).
     - Commit message: `Prepare for va.b.c`.
 4. Install to local by `./gradlew clean build install --no-build-cache`. Test it with example projects.