Polish diamond operator usage

Author: ngocnhan-tran1996

spring-data-r2dbc/src/main/java/org/springframework/data/r2dbc/core/NamedParameterExpander.java

@@ -54,7 +54,7 @@ class NamedParameterExpander {
 	/**
 	 * Cache of original SQL String to ParsedSql representation.
 	 */
-	@SuppressWarnings("serial") private final Map<String, ParsedSql> parsedSqlCache = new LinkedHashMap<String, ParsedSql>(
+	@SuppressWarnings("serial") private final Map<String, ParsedSql> parsedSqlCache = new LinkedHashMap<>(
 			DEFAULT_CACHE_LIMIT, 0.75f, true) {
 		@Override
 		protected boolean removeEldestEntry(Map.Entry<String, ParsedSql> eldest) {