Updating requirements for libjuju 3.0.0 upgrade

Change-Id: I0b35e33332c25a7438857bbcdcfa3a76e911108d
Signed-off-by: Gulsum Atici <gulsum.atici@canonical.com>
diff --git a/requirements-test.in b/requirements-test.in
index febfdae..5be172a 100644
--- a/requirements-test.in
+++ b/requirements-test.in
@@ -23,3 +23,4 @@
 mock
 nose2
 requests-mock
+certifi==2022.9.24
\ No newline at end of file