Upgrade minimal Jenkins version to 2.303.1

Jenkinsfile

@@ -1 +1 @@
-buildPlugin(useAci: true)
+buildPlugin(useContainerAgent: true)

README.md

@@ -1,22 +1,28 @@
 
 # Jenkins Build Discarder Plugin
+
 [![Github Build](https://github.com/jenkinsci/build-discarder-plugin/actions/workflows/cd.yaml/badge.svg?branch=main)](https://github.com/jenkinsci/build-discarder-plugin/actions/workflows/cd.yaml)
 [![Jenkins Build](https://ci.jenkins.io/job/Plugins/job/build-discarder-plugin/job/main/badge/icon)](https://ci.jenkins.io/job/Plugins/job/build-discarder-plugin/job/main/)
 [![Jenkins Plugin](https://img.shields.io/jenkins/plugin/v/build-discarder.svg)](https://plugins.jenkins.io/build-discarder)
 [![GitHub release](https://img.shields.io/github/release/jenkinsci/build-discarder-plugin.svg?label=changelog)](https://github.com/jenkinsci/build-discarder-plugin/releases/latest)
 
 ## Introduction
+
 A global build discarder that's possible to override by adding a job
-specific discarder. The goal is to be able to have a global sensible default, that's possible to override if needed.
+specific discarder. The goal is to be able to have a global sensible default, that's possible to override if needed. The minimum supported version of Jenkins is `2.303.1`, the goal is to support
+the two latest versions of Jenkins LTS.
 
 ## Getting started
-The `Default Build Discarder` can be added here:   
+
+The `Default Build Discarder` can be added here:
 `Manage Jenkins >> Configure System >> Global Build Discarders`
 ![Alt text](docs/img/configure-default-discarder.png?raw=true "Title")
 
 ### Configuration as Code
+
 Add `defaultBuildDiscarder` to your `configuredBuildDiscarders` with the standard `logRotator` settings.
-```
+
+```xml
 unclassified:
   buildDiscarders:
     configuredBuildDiscarders:
@@ -31,9 +37,11 @@ unclassified:
 ```
 
 ## Override the settings with a job specific discarder
+
 Adding a [job specific discarder](https://stackoverflow.com/a/44155346) will
 make sure the `Default Build Discarder` is not applicable.
-```
+
+```groovy
 # Jenkinsfile
 pipeline {
   options {
@@ -44,14 +52,18 @@ pipeline {
 ```
 
 ## Background
+
 The build in [Specific Build Discarder](https://github.com/jenkinsci/jenkins/blob/449c5aced523a6e66fe3d6a804e5dbfd5c5c67c6/core/src/main/java/jenkins/model/SimpleGlobalBuildDiscarderStrategy.java)
 discards build independent of specific job discarders.
 
 ## Contributing
+
 See the default [contribution guidelines](https://github.com/jenkinsci/.github/blob/master/CONTRIBUTING.md) for Jenkins
 
 ### Local development
+
 Start Jenkins by running this command
-```
+
+```bash
 mvn hpi:run
 ```

pom.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <parent>
     <groupId>org.jenkins-ci.plugins</groupId>
@@ -13,7 +14,7 @@
   <packaging>hpi</packaging>
   <properties>
     <changelist>999999-SNAPSHOT</changelist>
-    <jenkins.version>2.263.1</jenkins.version>
+    <jenkins.version>2.303.1</jenkins.version>
     <java.level>8</java.level>
   </properties>
   <name>Build Discarder Plugin</name>
@@ -23,8 +24,8 @@
     <dependencies>
       <dependency>
         <groupId>io.jenkins.tools.bom</groupId>
-        <artifactId>bom-2.263.x</artifactId>
-        <version>937.v51fde92016ed</version>
+        <artifactId>bom-2.303.x</artifactId>
+        <version>1069.v4a8e43a79a40</version>
         <scope>import</scope>
         <type>pom</type>
       </dependency>