Update PublishData.json after M2 snap (#9049)

Author: allisonchou

eng/config/PublishData.json

@@ -7,7 +7,7 @@
       ],
       "vsBranch": "main",
       "vsMajorVersion": 17,
-      "insertionCreateDraftPR": true,
+      "insertionCreateDraftPR": false,
       "insertionTitlePrefix": "[17.8P2]"
     },
     "release/dev17.5": {
@@ -42,8 +42,9 @@
         "Shipping",
         "NonShipping"
       ],
-      "vsBranch": "main",
+      "vsBranch": "rel/d17.8",
       "vsMajorVersion": 17,
+      "insertionCreateDraftPR": false,
       "insertionTitlePrefix": "[17.8P1]"
     }
   }