Add exrension(s)->extension(s)

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index ae8d5e3..f2b1872 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -16851,6 +16851,8 @@
 exptected->expected
 exra->extra
 exract->extract
+exrension->extension
+exrensions->extensions
 exressed->expressed
 exression->expression
 exsist->exists, exist,