Fix typo in precommit yml

[daico007]

PR Summary:

I made a typo when trying to add an exclusion for precommit yml, which lead to fail precommit test. This PR fix that typo.

PR Checklist

---

• Includes appropriate unit test(s)
• Appropriate docstring(s) are added/updated
• Code is (approximately) PEP8 compliant
• Issue(s) raised/addressed?

[justinGilmer]

I dont think you need quotes around it.

[justinGilmer]

pre-commit seems to pass. Assuming everything passes, lgtm.

[codecov]

Codecov Report

Merging #439 (f2b6dc2) into master (af8c0b5) will not change coverage.
The diff coverage is n/a.

❗ Current head f2b6dc2 differs from pull request most recent head 7b8f92b. Consider uploading reports for the commit 7b8f92b to get more accurate results

@@           Coverage Diff           @@
##           master     #439   +/-   ##
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  Coverage   73.84%   73.84%           
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  Files          17       17           
  Lines        1839     1839           
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  Hits         1358     1358           
  Misses        481      481