Add another typo

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 4e20c6c..b5dc2cc 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -19837,6 +19837,7 @@
 pertrubation->perturbation
 pertrubations->perturbations
 pertrubing->perturbing
+pertub->perturb
 pertubate->perturb
 pertubated->perturbed
 pertubates->perturbs