Tell typos CI that "indexin" is valid

tecosaur · tecosaur · commit cc2f31f13712 · 2025-10-23T23:19:09.000+08:00
diff --git a/typos.toml b/typos.toml
@@ -1,2 +1,5 @@
 [default]
 extend-ignore-words-re = ["^[a-zA-Z]?[a-zA-Z]?[a-zA-Z]?[a-zA-Z]?$"]
+
+[default.extend-words]
+indexin = "indexin"
