Add typos for excavate and variants

Author: nathanjmcdougall

codespell_lib/data/dictionary.txt

@@ -25859,6 +25859,13 @@ evrywhere->everywhere
 evyrthing->everything
 ewhwer->where
 ewll->well
+exacavate->excavate
+exacavated->excavated
+exacavates->excavates
+exacavation->excavation
+exacavations->excavations
+exacavator->excavator
+exacavators->excavators
 exaclinic->hexaclinic
 exaclty->exactly
 exacly->exactly