Merge pull request #48125 from K-jun98

* gh-48125: Optimize StringBuilder initialization in CorrelationIdFormatter Closes gh-48125

Author: wilkinsona

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/CorrelationIdFormatter.java

@@ -85,7 +85,7 @@ private CorrelationIdFormatter(List<Part> parts) {
  * @return a formatted correlation id
  */
 public String format(UnaryOperator<String> resolver) {
-StringBuilder result = new StringBuilder();
+StringBuilder result = new StringBuilder(this.blank.length());
 formatTo(resolver, result);
 return result.toString();
 }