Update args type (#19638)

Related to microsoft/debugpy#1004.

Author: paulacamargo25

package.json

@@ -1195,11 +1195,14 @@
                         "properties": {
                             "args": {
                                 "default": [],
-                                "description": "Command line arguments passed to the program",
+                                "description": "Command line arguments passed to the program.",
                                 "items": {
                                     "type": "string"
                                 },
-                                "type": "array"
+                                "type": [
+                                    "array",
+                                    "string"
+                                ]
                             },
                             "autoReload": {
                                 "default": {},