docs: fix redirect link

[jiangtj]

Fix redirect link: from https://containrrr.github.io to https://containrrr.dev

[codecov]

Codecov Report

Merging #1146 (9b6f5cb) into main (e14cc29) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1146   +/-   ##
=======================================
  Coverage   61.89%   61.89%           
=======================================
  Files          23       23           
  Lines        1475     1475           
=======================================
  Hits          913      913           
  Misses        476      476           
  Partials       86       86           

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[piksel]

Good catch!