ngalert swagger: Fix status code (#79415)

This endpoint returns a 202, not a 204
Let me know if we should instead change the response of the API

pkg/services/ngalert/api/tooling/post.json

@@ -1928,13 +1928,13 @@
   },
   "MuteTimeIntervalExport": {
    "properties": {
-    "OrgID": {
-     "format": "int64",
-     "type": "integer"
-    },
     "name": {
      "type": "string"
     },
+    "orgId": {
+     "format": "int64",
+     "type": "integer"
+    },
     "time_intervals": {
      "items": {
       "$ref": "#/definitions/TimeInterval"
@@ -4419,7 +4419,6 @@
    "type": "array"
   },
   "gettableSilence": {
-   "description": "GettableSilence gettable silence",
    "properties": {
     "comment": {
      "description": "comment",
@@ -4618,7 +4617,6 @@
    "type": "array"
   },
   "postableSilence": {
-   "description": "PostableSilence postable silence",
    "properties": {
     "comment": {
      "description": "comment",
@@ -7136,7 +7134,7 @@
      }
     ],
     "responses": {
-     "204": {
+     "202": {
       "description": " The contact point was deleted successfully."
      }
     },