ci: actions bot includes tested pr commit hash in the conformance message

[zhuzhu81998]

Closes #4760

Took more time than expected because i didnt know trigger conditions of github actions well enough 😂

Demo (zhuzhu81998#2):

[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	52,862	52,862	0
Passed	49,505	49,505	0
Ignored	2,261	2,261	0
Failed	1,096	1,096	0
Panics	0	0	0
Conformance	93.65%	93.65%	0.00%

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 57.10%. Comparing base (6ddc2b4) to head (58a22ac).
⚠️ Report is 707 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4765      +/-   ##
==========================================
+ Coverage   47.24%   57.10%   +9.85%     
==========================================
  Files         476      553      +77     
  Lines       46892    60603   +13711     
==========================================
+ Hits        22154    34606   +12452     
- Misses      24738    25997    +1259     

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[jedel1043]

Looks awesome!