Update README.md - Fix broken URL

[SamerKhshiboun]

Fix broken URL of
Latest development (source)(https://docs.ros.org/en/rolling/Installation/Alternatives/Latest-Development-Setup.html#latest-development-source)

[christophebedard]

Thanks for the fix! Could you sign off your commit? git commit --amend --no-edit -s and then force push

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (ac6b74f) 93.18% compared to head (c6575d4) 93.18%.

❗ Current head c6575d4 differs from pull request most recent head 818a318. Consider uploading reports for the commit 818a318 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #595   +/-   ##
=======================================
  Coverage   93.18%   93.18%           
=======================================
  Files           8        8           
  Lines         176      176           
  Branches       17       17           
=======================================
  Hits          164      164           
  Misses         12       12           

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