Fix Doc Build Error

[DLu]

🦟 Bug fix

Fixes #265

Summary

I updated the escaping to match https:/ignitionrobotics/ign-launch/blob/bcb63ff01198569e5c31101131e0374bed1e8672/CMakeLists.txt#L121

I don't know the first thing about CMake, but it seemed to fix the problem.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• 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

[codecov]

Codecov Report

Merging #266 (aed7f39) into ign-gui5 (cac3da7) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           ign-gui5     #266   +/-   ##
=========================================
  Coverage     66.12%   66.12%           
=========================================
  Files            26       26           
  Lines          3218     3218           
=========================================
  Hits           2128     2128           
  Misses         1090     1090           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update cac3da7...aed7f39. Read the comment docs.

[chapulina]

Thanks! I verified that the links to upstream libraries are generated correctly 👍