RFR: 8362501: Update test/hotspot/jtreg/applications/jcstress/README [v2]

[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:

  Update README

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26369/files
  - new: https://git.openjdk.org/jdk/pull/26369/files/78320797..d024994c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26369&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26369&range=00-01

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 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