Update owner/mentionees for System.Transactions (#76021)

Author: roji

.github/fabricbot.json

@@ -74,6 +74,14 @@
             "dotnet/area-system-text-regularexpressions"
           ]
         },
+        {
+          "labels": [
+            "area-System.Transactions"
+          ],
+          "mentionees": [
+            "roji"
+          ]
+        },
         {
           "labels": [
             "area-GC-mono"

docs/area-owners.json

@@ -1400,7 +1400,8 @@
     {
       "lead": "HongGit",
       "owners": [
-        "HongGit"
+        "HongGit",
+        "roji"
       ],
       "label": "area-System.Transactions"
     },

docs/area-owners.md

@@ -130,7 +130,7 @@ Note: Editing this file doesn't update the mapping used by `@msftbot` for area-s
 | area-System.Threading.Channels                 | @ericstj      | @dotnet/area-system-threading-channels              | Consultants: @stephentoub                                                                                                                                                                                                                                                                 |
 | area-System.Threading.RateLimiting             | @rafikiassumani-msft | @BrennanConroy @halter73                     | Consultants: @eerhardt                                                                                                                                                                                                                                                                    |
 | area-System.Threading.Tasks                    | @ericstj      | @dotnet/area-system-threading-tasks                 | Consultants: @stephentoub                                                                                                                                                                                                                                                                 |
-| area-System.Transactions                       | @HongGit      | @HongGit                                            |                                                                                                                                                                                                                                                                                           |
+| area-System.Transactions                       | @HongGit      | @HongGit                                            | Consultants: @roji                                                                                                                                                                                                                                                                        |
 | area-System.Xml                                | @jeffhandley  | @dotnet/area-system-xml                             |                                                                                                                                                                                                                                                                                           |
 | area-Threading-mono                            | @SamMonoRT    | @lambdageek                                         |                                                                                                                                                                                                                                                                                           |
 | area-TieredCompilation-coreclr                 | @mangod9      | @kouvel                                             |                                                                                                                                                                                                                                                                                           |