build(make): update the armclang version

It hasn't been updated since 2022. Bump it to the latest available.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Ie0db5f8fe0d7a167fb5facad2a04370b8c89d5c6
diff --git a/script/tf-coverity/common-def.sh b/script/tf-coverity/common-def.sh
index bec96fc..cff0481 100644
--- a/script/tf-coverity/common-def.sh
+++ b/script/tf-coverity/common-def.sh
@@ -65,10 +65,10 @@
 
 # Provide correct armclang toolchain based on environment
 set_armclang_toolchain() {
-    local armclang_path="/home/buildslave/tools/armclang-6.18/bin"
+    local armclang_path="/home/buildslave/tools/armclang-6.23/bin"
 
     # if under arm enviroment, overide cross-compilation path
-    is_arm_jenkins_env || upon "$local_ci" && armclang_path="/arm/warehouse/Distributions/FA/ARMCompiler/6.18/19/standalone-linux-x86_64-rel/bin"
+    is_arm_jenkins_env || upon "$local_ci" && armclang_path="/arm/warehouse/Distributions/FA/ARMCompiler/6.23/37/standalone-linux-x86_64-rel/bin"
 
     echo "${armclang_path}/armclang"
 }