test(cli): Check more former false positives

crates/typos-cli/tests/cmd/false-positives.in/README.md

@@ -1 +1,7 @@
 add-ons should not be corrected to add-owns
+
+git glossary has both commitish and committish, so don't correct them
+
+HTTP_REFERER is a valid HTTP header field
+
+It should be reasonable to talk about `<thead>`

crates/typos-cli/tests/cmd/false-positives.in/sample.py

@@ -0,0 +1 @@
+from numpy.typing import NDArray  # should work

crates/typos-cli/tests/cmd/false-positives.in/sample.rs

@@ -0,0 +1,3 @@
+use serde::ser;
+
+use flate2::*;