test/py/requirements.txt: Bump setuptools to 70.3.0

There is some potential security issue resolved by upgrading to v70.0.0
here and the latest is now v70.3.0.

Reported-by: GitHub dependabot
Suggested-by: Sebastian Kropatsch <seb-dev@mail.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/test/py/requirements.txt b/test/py/requirements.txt
index 6d3030c..2b14898 100644
--- a/test/py/requirements.txt
+++ b/test/py/requirements.txt
@@ -21,7 +21,7 @@
 python-mimeparse==1.6.0
 python-subunit==1.3.0
 requests==2.32.2
-setuptools==65.5.1
+setuptools==70.3.0
 six==1.16.0
 testtools==2.3.0
 traceback2==1.4.0