releaseCheck is not using exact string matches, but picks up substrings

[sxa]

Split out from January 2024 retrospective -

https://ci.adoptium.net/job/build-scripts/job/release/job/refactor_openjdk_release_tool/8089/ was published with a name missing the jdk- prefix, but the releaseCheck.sh didn't show it as everything abnormal - it seems to have found the right release - perhaps because it was a substring of the 'real' value - something to look at it in the releaseCheck.sh script as a potential buglet.

          https://ci.adoptium.net/job/build-scripts/job/release/job/refactor_openjdk_release_tool/8089/ was published with a name missing the `jdk-` prefix, but the releaseCheck.sh didn't show it as everything abnormal - it seems to have found the right release - perhaps because it was a substring of the 'real' value - something to look at it in the releaseCheck.sh script as a potential buglet.

*** PERFORMING RELEASE CHECK TO SEE IF THERE ARE ANY UNEXPECTED PROBLEMS ***
Grabbing information from https://github.com/adoptium/temurin21-binaries/releases/tag/21.0.2+13
FILTER IS: 21.0.2%2B13
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
100 12464    0 12464    0     0   6000      0 --:--:--  0:00:02 --:--:--  6000
100 10.1M    0 10.1M    0     0  4756k      0 --:--:--  0:00:02 --:--:-- 4756k
Linux on x64: OK!
Linux on aarch64: OK!
Linux on ppc64le: OK!
Linux on s390x: OK!
Linux on arm: Not published:
AIX on ppc64: OK!
Alpine on x64: OK!
Alpine on aarch64: OK!
Windows on x64: OK!
MacOS on x64: OK!
MacOS on aarch64: OK!
Source images: OK!

Originally posted by @sxa in adoptium/temurin#13 (comment)