Fixed triangule tutorial instructions

[ahcorde]

Signed-off-by: ahcorde [email protected]

🦟 Bug fix

Summary

Fixed triangule tutorial instructions. Get the right branch.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #495 (9c87fe6) into gz-math7 (cc9f5de) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           gz-math7     #495   +/-   ##
=========================================
  Coverage     99.70%   99.70%           
=========================================
  Files            77       77           
  Lines          7007     7007           
=========================================
  Hits           6986     6986           
  Misses           21       21           

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