Update builder.md

[pitmonticone]

Fixed a typo.

[coveralls]

Pull Request Test Coverage Report for Build 2562343311

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 64.587%

---

Totals
Change from base Build 2249572744:	-0.07%
Covered Lines:	1439
Relevant Lines:	2228

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 2562343311

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+5.8%) to 70.456%

---

Totals
Change from base Build 2249572744:	5.8%
Covered Lines:	1791
Relevant Lines:	2542

---

💛 - Coveralls

[codecov]

Codecov Report

Merging #645 (14da2cf) into master (40bacf8) will increase coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #645      +/-   ##
==========================================
+ Coverage   65.58%   65.84%   +0.25%     
==========================================
  Files          32       32              
  Lines        2720     2720              
==========================================
+ Hits         1784     1791       +7     
+ Misses        936      929       -7     

Impacted Files	Coverage Δ
src/GLib/gtype.jl	76.44% <0.00%> (+0.41%)	⬆️
src/GLib/signals.jl	76.63% <0.00%> (+2.45%)	⬆️

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[timholy]

Thanks!