chore(deps): Update gradle and github actions

Author: renovate[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ version = "1.0"
 
 [versions]
 checkstyle = "10.20.2"
-indra = "3.1.3"
+indra = "4.0.0"
 junit = "5.11.4"
 
 [libraries]
@@ -25,4 +25,4 @@ indra-crossdoc = { id = "net.kyori.indra.crossdoc", version.ref = "indra" }
 indra-licenser-spotless = { id = "net.kyori.indra.licenser.spotless", version.ref = "indra" }
 indra-publishing-sonatype = { id = "net.kyori.indra.publishing.sonatype", version.ref = "indra" }
 nexusPublish = { id = "io.github.gradle-nexus.publish-plugin", version = "2.0.0-rc-1" }
-spotless = "com.diffplug.spotless:6.21.0"
+spotless = "com.diffplug.spotless:8.8.0"

gradle/wrapper/gradle-wrapper.jar

@@ -1,7 +1,9 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.6.1-bin.zip
 networkTimeout=10000
+retries=0
+retryBackOffMs=500
 validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 plugins {
-  id "org.gradle.toolchains.foojay-resolver-convention" version "0.7.0"
+  id "org.gradle.toolchains.foojay-resolver-convention" version "1.0.0"
 }
 
 dependencyResolutionManagement {