Add the errors to the job summary along with suggested commands to fix the
problem. The commits and filenames are links.

This is for issue #1395. Sample job output
[https://github.com/webstech/check-whitespace/actions/runs/3707382446]:

❌ A whitespace issue was found in one or more of the commits.

Run these commands to correct the problem:

1. git rebase --whitespace=fix aaa04a9
2. git push --force

Errors:

1. --- 5cd37f6 Remove annotations
   trailing.txt:4: trailing whitespace.
   +
   trailing.txt:2: new blank line at EOF.

Chris. Webster (2):
  Make `check-whitespace` failures more helpful
  Improve check-whitespace output

 .github/workflows/check-whitespace.yml | 57 +++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 11 deletions(-)

base-commit: 57e2c6ebbe7108b35ba30184dcbcb6c34c929ad8

Submitted-As: https://lore.kernel.org/git/pull.1444.git.1671179520.gitgitgadget@gmail.com