Dict: Add integral

codespell_lib/data/dictionary.txt

diff --git a/codespell_lib/data/dictionary.txt b/codespell_lib/data/dictionary.txt
index 7150700..4b9ebe5 100644
--- a/codespell_lib/data/dictionary.txt
+++ b/codespell_lib/data/dictionary.txt
@@ -15997,6 +15997,7 @@
 isue->issue
 iteartor->iterator
 iteger->integer
+itegral->integral
 iten->item
 itens->items
 itention->intention