Update schema.v2.json

Author: github-actions[bot]

static/schema/schema.v2.json

@@ -336,6 +336,14 @@
 									},
 									"default": [],
 									"description": "Base branches (other than the default branch) to review. Accepts regex patterns."
+								},
+								"ignore_usernames": {
+									"type": "array",
+									"items": {
+										"type": "string"
+									},
+									"default": [],
+									"description": "Ignore reviewing pull requests by these usernames. These should match the Git platform usernames exactly, not the email addresses."
 								}
 							},
 							"additionalProperties": false,