chore(coverity): upgrade Coverity build tool

Upgrade to the latest version provided by Synopsys (2023.6.2).
Version 2022.6.0 is no longer supported.

Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Change-Id: I36caced2c982cc382ddf31065874809bd26121cd
diff --git a/tf-a-coverity.yaml b/tf-a-coverity.yaml
index 523d011..3e2da80 100644
--- a/tf-a-coverity.yaml
+++ b/tf-a-coverity.yaml
@@ -30,7 +30,7 @@
             default: '+refs/heads/master:refs/remotes/origin/master'
         - string:
             name: COVERITY_VERSION
-            default: '2022.6.0'
+            default: '2023.6.2'
         - bool:
             name: UPLOAD_TO_COVERITY_SCAN_ONLINE
             default: true