Fix tests

Author: shanejbrown

examples/build/builders/global-config-list.yaml

@@ -17,6 +17,4 @@ platform-builders:
     - builder2
     - builder3
   linux/arm64/v8:
-    - builder1
-    - builder2
-    - builder3
+    - builder1

tests/test_config_validation/test_global_config.py

@@ -139,23 +139,16 @@ def fixture_override_master_config_file(tmp_path):
           """,
             [],
         ),
-        (
-            """
-          platform-builders:
-            linux/amd64: builder1
-            linux/arm64:
-              - builder1
-              - builder2
-          """,
-            [],
-        ),
         (
             """
           platform-builders:
             - builder1
             - builder2
           """,
-            ["platform-builders:  Input should be a valid dictionary (dict_type)"],
+            [
+                "  platform-builders.dict[str,str]:  Input should be a valid dictionary (dict_type)",
+                "  platform-builders.dict[str,list[str]]:  Input should be a valid dictionary (dict_type)",
+            ],
         ),
     ],
 )