Bump xyz.wagyourtail.jvmdowngrader:gradle-plugin from 1.2.0 to 1.2.1

Bumps [xyz.wagyourtail.jvmdowngrader:gradle-plugin](https://github.com/unimined/JvmDowngrader) from 1.2.0 to 1.2.1.
- [Release notes](https://github.com/unimined/JvmDowngrader/releases)
- [Commits](unimined/JvmDowngrader@1.2.0...1.2.1)

---
updated-dependencies:
- dependency-name: xyz.wagyourtail.jvmdowngrader:gradle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -10,7 +10,7 @@ buildscript {
         classpath "com.gradleup.shadow:shadow-gradle-plugin:8.3.4"
         classpath "net.minecraftforge.gradle:ForgeGradle:6.+"
         classpath "org.spongepowered:mixingradle:0.7-SNAPSHOT"
-        classpath "xyz.wagyourtail.jvmdowngrader:gradle-plugin:1.2.0"
+        classpath "xyz.wagyourtail.jvmdowngrader:gradle-plugin:1.2.1"
     }
 }