Upgrade: Bump it.unimi.dsi:fastutil from 8.5.14 to 8.5.15

Bumps [it.unimi.dsi:fastutil](https://github.com/vigna/fastutil) from 8.5.14 to 8.5.15.
- [Changelog](https://github.com/vigna/fastutil/blob/master/CHANGES)
- [Commits](vigna/fastutil@8.5.14...8.5.15)

---
updated-dependencies:
- dependency-name: it.unimi.dsi:fastutil
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle.kts

@@ -11,7 +11,7 @@ repositories {
 dependencies {
     api("com.google.code.gson:gson:2.11.0")
     api("com.viaversion:nbt:5.0.0")
-    api("it.unimi.dsi:fastutil:8.5.14")
+    api("it.unimi.dsi:fastutil:8.5.15")
     api("ch.qos.logback:logback-classic:1.5.8")
     compileOnly("org.jetbrains:annotations:26.0.1")
     // Uncomment to manually run mappings gen in ide