📖 Update bestpractices links

[fredgan]

What kind of change does this PR introduce?

Update BestPractices links where they currently redirect.

• PR title follows the guidelines defined in our pull request documentation

What is the current behavior?

Old domain name bestpractices.coreinfrastructure.org are used in the BestPractices.

What is the new behavior (if this is a feature change)?**

New domain name www.bestpractices.dev are used in the BestPractices.

• Tests for the changes have been added (for bug fixes/features)

Which issue(s) this PR fixes

NONE

Special notes for your reviewer

NONE

Does this PR introduce a user-facing change?

Update new domain name of Best Practices.

[spencerschrock]

Thanks.

For myself and others, here's some context: coreinfrastructure/best-practices-badge#2043

[spencerschrock]

@fredgan can you please DCO the commit? These instructions come from the Details link of the DCO check/status.

To add your Signed-off-by line to every commit in this branch:

Ensure you have a local copy of your branch by checking out the pull request locally via command line.
In your local branch, run: git rebase HEAD~1 --signoff
Force push your changes to overwrite the branch: git push --force-with-lease origin fix_bestpractices_links

[gabibguti]

LGTM

DCO Bot is still complaining about a missing whitespace in the signoff name:
Expected "Fred Gan ganshaolong@vip.qq.com", but got "FredGan ganshaolong@vip.qq.com".
Did you use the git rebase HEAD~1 --signoff command?

[fredgan]

Fixed, thanks @spencerschrock @gabibguti

[codecov]

Codecov Report

Merging #3448 (a20fbab) into main (ac6ea11) will decrease coverage by 8.53%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3448      +/-   ##
==========================================
- Coverage   72.80%   64.27%   -8.53%     
==========================================
  Files         186      186              
  Lines       13155    13155              
==========================================
- Hits         9577     8455    -1122     
- Misses       3059     4237    +1178     
+ Partials      519      463      -56