Fix wrong pad num in rich progress bar

[shenmishajing]

What does this PR do?

Fixes #12113

Does your PR introduce any breaking changes? If yes, please list them.

No

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[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. If you need further help see our docs: https://pytorch-lightning.readthedocs.io/en/latest/generated/CONTRIBUTING.html#pull-request or ask the assistance of a core contributor here or on Slack. Thank you for your contributions.

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This pull request is going to be closed. Please feel free to reopen it create a new from the actual master.

[carmocca]

Can you also update the CHANGELOG and add a test for this?

[codecov[bot]]

Codecov Report

Merging #12125 (861b14f) into master (9722127) will increase coverage by 15%. The diff coverage is 100%.

:exclamation: Current head 861b14f differs from pull request most recent head 984e14d. Consider uploading reports for the commit 984e14d to get more accurate results

@@            Coverage Diff            @@
##           master   #12125     +/-   ##
=========================================
+ Coverage      61%      76%    +15%     
=========================================
  Files         324      324             
  Lines       26369    26739    +370     
=========================================
+ Hits        16138    20438   +4300     
+ Misses      10231     6301   -3930     

[kaushikb11]

@Borda Seems like I can't resolve the conflicts as https://github.com/shenmishajing/pytorch-lightning.git doesn't exist.

Do you know a solution for this?

[carmocca]

@kaushikb11 I suggest copying the patch into a branch of your own and opening a new PR that closes this one