Fix stupid build error and a couple gradle warnings

thank you gradle .replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.getDefault()) else it.toString() } is clearly better than .capitalize()

platforms/quilt/build.gradle.kts.disabled

@@ -60,6 +60,6 @@ tasks {
     remapJar {
         injectAccessWidener.set(true)
         inputFile.set(shadowJar.get().archiveFile)
-        archiveFileName.set("${rootProject.name.capitalize()}-quilt-${project.version}.jar")
+        archiveFileName.set("${rootProject.name.replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.getDefault()) else it.toString() })}-quilt-${project.version}.jar")
     }
 }