refactor(scripts): capitalize ZMK in west test script

app/scripts/west-commands.yml

@@ -6,4 +6,4 @@ west-commands:
     commands:
       - name: test
         class: Test
-        help: run zmk testsuite
+        help: run ZMK testsuite

app/scripts/west_commands/test.py

@@ -14,9 +14,9 @@ class Test(WestCommand):
     def __init__(self):
         super().__init__(
             'test',  # gets stored as self.name
-            'run zmk testsuite',  # self.help
+            'run ZMK testsuite',  # self.help
             # self.description:
-            dedent('''Run the zmk testsuite.'''))
+            dedent('''Run the ZMK testsuite.'''))
 
     def do_add_parser(self, parser_adder):
         parser = parser_adder.add_parser(self.name,