Prefer StringBuilder for local variables

[elharo]

since they don't need synchronization

[Copilot]

Pull request overview

This PR converts local StringBuffer variables to StringBuilder for better performance, since local variables don't require the thread-safety overhead of StringBuffer's synchronized methods.

Changes:

• Changed StringBuffer to StringBuilder in XmlWriterUtil's writeComment method
• Changed StringBuffer to StringBuilder in StringUtils' uncapitalise method
• Changed StringBuffer to StringBuilder in StringUtils' reverse method

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/main/java/org/apache/maven/shared/utils/xml/XmlWriterUtil.java	Converted local StringBuffer variable to StringBuilder in the writeComment method
src/main/java/org/apache/maven/shared/utils/StringUtils.java	Converted local StringBuffer instances to StringBuilder in uncapitalise and reverse methods

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[elharo]

[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for org.apache.maven.shared:maven-shared-utils:3.4.3-SNAPSHOT: The following artifacts could not be resolved: org.apache.maven.shared:maven-shared-components:pom:47 (absent): Could not transfer artifact org.apache.maven.shared:maven-shared-components:pom:47 from/to central (https://repo.maven.apache.org/maven2): PKIX path validation failed: java.security.cert.CertPathValidatorException: validity check failed and 'parent.relativePath' points at wrong local POM @ line 23, column 11
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