Bump com.gradleup.shadow:shadow-gradle-plugin from 8.3.0 to 8.3.1

Bumps [com.gradleup.shadow:shadow-gradle-plugin](https://github.com/GradleUp/shadow) from 8.3.0 to 8.3.1.
- [Release notes](https://github.com/GradleUp/shadow/releases)
- [Commits](GradleUp/shadow@8.3.0...8.3.1)

---
updated-dependencies:
- dependency-name: com.gradleup.shadow:shadow-gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -7,7 +7,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "com.gradleup.shadow:shadow-gradle-plugin:8.3.0"
+        classpath "com.gradleup.shadow:shadow-gradle-plugin:8.3.1"
         classpath "net.minecraftforge.gradle:ForgeGradle:6.+"
         classpath "org.spongepowered:mixingradle:0.7-SNAPSHOT"
         classpath "xyz.wagyourtail.jvmdowngrader:gradle-plugin:1.1.2"