Add tigthly -> tightly

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 1b8ac90..9b5c542 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -4300,6 +4300,7 @@
 thta->that
 thyat->that
 tiem->time, item,
+tigthly->tightly
 tihkn->think
 tihs->this
 timestan->timespan