RFR: 7903962: Update IDEA plugin documentation [v3]

[Oleksii Sylichenko]

> Update menu item location to open default settings window.
> 
> Current location is: `File -> New Projects Setup -> Settings for New Projects...`
> 
> Checked in "IntelliJ IDEA 2024.3.2.2 (Community Edition)".
> 
> ![Default settings menu location](https://github.com/user-attachments/assets/e9b94e74-5bea-476f-bcb1-f75ce76f3fc2)

Oleksii Sylichenko has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  Update README.md
  
  Update menu item location to open default settings window.

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Changes: https://git.openjdk.org/jtreg/pull/247/files
  Webrev: https://webrevs.openjdk.org/?repo=jtreg&pr=247&range=02
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jtreg/pull/247.diff
  Fetch: git fetch https://git.openjdk.org/jtreg.git pull/247/head:pull/247

PR: https://git.openjdk.org/jtreg/pull/247