[jdk25u] RFR: 8357799: Improve instructions for JFileChooser/HTMLFileName.java

[Sarvesh Kumar Jain]

Backport of [JDK-8357799](https://bugs.openjdk.org/browse/JDK-8357799)

Testing:
Manual Test executed with JDK-25, Test Passed.
Log:
Directory "/Users/sarvesh/Backport/result/workDir" not found: creating
Directory "/Users/sarvesh/Backport/result/reportDir" not found: creating
runner starting test: javax/swing/JFileChooser/HTMLFileName.java#metal
runner finished test: javax/swing/JFileChooser/HTMLFileName.java#metal
Passed. Execution successful
runner starting test: javax/swing/JFileChooser/HTMLFileName.java#system
runner finished test: javax/swing/JFileChooser/HTMLFileName.java#system
Passed. Execution successful
Test results: passed: 2
Report written to /Users/sarvesh/Backport/result/reportDir/html/report.html
Results written to /Users/sarvesh/Backport/result/workDir

-------------

Commit messages:
 - Backport 53a83d15a1b5686ed0f2aeb3d30cd46b73f80733

Changes: https://git.openjdk.org/jdk25u/pull/32/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=32&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8357799
  Stats: 48 lines in 1 file changed: 19 ins; 10 del; 19 mod
  Patch: https://git.openjdk.org/jdk25u/pull/32.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/32/head:pull/32

PR: https://git.openjdk.org/jdk25u/pull/32