Suppress fall-through warning in minmash's murmur

lucene/analysis/common/src/java/org/apache/lucene/analysis/minhash/MinHashFilter.java

@@ -402,6 +402,7 @@ public class MinHashFilter extends TokenFilter {
   }
 
   /** Returns the MurmurHash3_x64_128 hash, placing the result in "out". */
+  @SuppressWarnings("fallthrough") // the huge switch is designed to use fall through into cases!
   static void murmurhash3_x64_128(byte[] key, int offset, int len, int seed, LongPair out) {
     // The original algorithm does have a 32 bit unsigned seed.
     // We have to mask to match the behavior of the unsigned types and prevent sign extension.