RFR: 8362501: Update test/hotspot/jtreg/applications/jcstress/README [v3]

[SendaoYan]

> Hi all,
> 
> Currently, this is no documentation on how to run the application/jcstress tests. I think it will be useful to complement the document test/hotspot/jtreg/applications/jcstress/README on how to run the jcstress tests in jtreg.
> 
> No behaviour has been change, only update the ducumentation, no risk.

SendaoYan has updated the pull request incrementally with one additional commit since the last revision:

  Use starting instead of start
  
  Co-authored-by: David Holmes <62092539+dholmes-ora at users.noreply.github.com>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26369/files
  - new: https://git.openjdk.org/jdk/pull/26369/files/d024994c..716b97c4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26369&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26369&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26369.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26369/head:pull/26369

PR: https://git.openjdk.org/jdk/pull/26369