test-case: latency-metrics.sh: Change True to lowercase

This fixes the wrong syntax of the bash built-in `true`.

Signed-off-by: Pawel Langowski <pawelx.langowski@intel.com>

Author: PLangowski

test-case/latency-metrics.sh

@@ -260,7 +260,7 @@ report_end()
 
 main()
 {
-  pkill jackd || True
+  pkill jackd || true
   check_latency_options
 
   setup_kernel_check_point