Update configs for 17.12p3 snap

eng/Versions.props

@@ -30,7 +30,7 @@
     imported. This OK because we want to just have an obvious salt for a local build.
   -->
   <PropertyGroup>
-    <VsixVersionPrefix>17.12.2</VsixVersionPrefix>
+    <VsixVersionPrefix>17.12.3</VsixVersionPrefix>
     <AddinMajorVersion>17.12</AddinMajorVersion>
     <AddinVersion>$(AddinMajorVersion)</AddinVersion>
     <AddinVersion Condition="'$(OfficialBuildId)' != ''">$(AddinVersion).$(OfficialBuildId)</AddinVersion>

eng/config/PublishData.json

@@ -28,8 +28,8 @@
       ],
       "vsBranch": "main",
       "vsMajorVersion": 17,
-      "insertionCreateDraftPR": false,
-      "insertionTitlePrefix": "[d17.12 P2]"
+      "insertionCreateDraftPR": true,
+      "insertionTitlePrefix": "[d17.12 P3]"
     },
     "release/dev17.6": {
       "nugetKind": [
@@ -92,10 +92,10 @@
         "Shipping",
         "NonShipping"
       ],
-      "vsBranch": "rel/d17.12",
+      "vsBranch": "main",
       "vsMajorVersion": 17,
       "insertionCreateDraftPR": false,
-      "insertionTitlePrefix": "[d17.12 P1]"
+      "insertionTitlePrefix": "[d17.12 P2]"
     }
   }
 }