fix: update broken pm-qa repository URL

Change-Id: I2d0558d3f92b8b41777105a12b556166c1e71e7e
Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com>
diff --git a/script/make_stress_test_image.sh b/script/make_stress_test_image.sh
index f10f7df..1e73d0c 100755
--- a/script/make_stress_test_image.sh
+++ b/script/make_stress_test_image.sh
@@ -103,7 +103,7 @@
 cd test_assets
 rm -rf "pm-qa"
 echo "Cloning pm-qa..."
-git clone -q --depth 1 git://git.linaro.org/tools/pm-qa.git
+git clone -q --depth 1 https://git.linaro.org/tools/pm-qa.git
 echo "Cloned pm-qa."
 
 cd