Upgrade Coverity scan to version 2021.12.1

Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
Change-Id: I7f3879c684806a9110860b2e317b9a645e15eabf
diff --git a/script/tf-coverity/run_coverity_on_tf.py b/script/tf-coverity/run_coverity_on_tf.py
index 2e18686..0f1e45b 100755
--- a/script/tf-coverity/run_coverity_on_tf.py
+++ b/script/tf-coverity/run_coverity_on_tf.py
@@ -36,7 +36,7 @@
 
 
 def get_coverity_tool():
-    coverity_tarball = "cov-analysis-linux64-2020.09.tar.gz"
+    coverity_tarball = "cov-analysis-linux64-2021.12.1.tar.gz"
     url = "http://files.oss.arm.com/downloads/tf-a/" + coverity_tarball
     print("Downloading Coverity Build tool from %s..." % url)
     file_handle = urllib.request.urlopen(url)