Bump com.puppycrawl.tools:checkstyle to 14.1.0 and fix warnings that were false-negatives before [ci skip]

Checkstyle fixed a bunch of false-negatives; linting errors in the source that should've been caught according to our settings. Rather than updating `checkstyle.xml` to work around these, this commit also properly fixes these checkstyle errors.

native/src/main/java/com/velocitypowered/natives/util/MoreByteBufUtils.java

@@ -54,8 +54,8 @@ public class MoreByteBufUtils {
     BufferPreference preferred = nativeStuff.preferredBufferType();
     return switch (preferred) {
       case DIRECT_PREFERRED, HEAP_PREFERRED ->
-        // The native prefers this type, but doesn't strictly require we provide it.
-        true;
+          // The native prefers this type, but doesn't strictly require we provide it.
+          true;
       case DIRECT_REQUIRED -> buf.hasMemoryAddress();
       case HEAP_REQUIRED -> buf.hasArray();
     };