test/py/requirements.txt: Bump zipp to current release

A security issue exists with zipp before v3.19.1, and the current
release is now v3.19.2. While the change in versions numbers is large, a
manual inspection of the changelog shows that it's not as big as might
be implied.

Reported-by: GitHub dependabot
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/test/py/requirements.txt b/test/py/requirements.txt
index c1dd636..6d3030c 100644
--- a/test/py/requirements.txt
+++ b/test/py/requirements.txt
@@ -27,4 +27,4 @@
 traceback2==1.4.0
 unittest2==1.1.0
 wcwidth==0.1.7
-zipp==0.6.0
+zipp==3.19.2