Update tips.txt

[michaelleb]

fix typo: produce --> product

[carltongibson]

Yep, great. Thanks.

[codecov-commenter]

Codecov Report

Merging #1437 (8e4101c) into main (512310f) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1437   +/-   ##
=======================================
  Coverage   99.44%   99.44%           
=======================================
  Files          15       15           
  Lines        1270     1270           
=======================================
  Hits         1263     1263           
  Misses          7        7           

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