Update tests/metrics/test_thread_cpu.py

Co-authored-by: Eric Eastwood <erice@element.io>

tests/metrics/test_thread_cpu.py

@@ -57,7 +57,7 @@ class ThreadCPUMetricsTestCase(unittest.TestCase):
         type, and the types add up to the CPU the whole process used.
         """
         if not os.path.isdir("/proc/self/task"):
-            self.skipTest("thread CPU metrics need /proc/self/task (Linux only)")
+            self.skipTest("Skipping as `ThreadCPUMetrics` tests require /proc/self/task (Linux only)")
 
         # A fresh collector, so threads registered elsewhere don't count. It
         # reports process-level metrics, so it has no `SERVER_NAME_LABEL`.