update auto merge config (#79949)

Author: RikkiGibson

.github/workflows/main-merge.yml

@@ -21,6 +21,6 @@ jobs:
     if: github.repository == 'dotnet/roslyn'
     uses: dotnet/arcade/.github/workflows/inter-branch-merge-base.yml@main
     with:
-      configuration_file_path: 'eng/config/main-to-main-vs-deps-branch-merge.jsonc'
+      configuration_file_path: 'eng/config/community-to-main-branch-merge.jsonc'
       configuration_file_branch: ${{ inputs.configuration_file_branch || 'main' }}
 

eng/config/main-to-main-vs-deps-branch-merge.jsonc renamed to eng/config/community-to-main-branch-merge.jsonc

@@ -1,9 +1,9 @@
 // Used by .github/workflows/main-merge.yml
 {
     "merge-flow-configurations": {
-        // Merge any main changes to main-vs-deps.
-        "main": {
-            "MergeToBranch": "main-vs-deps",
+        // Merge any community changes to main.
+        "community": {
+            "MergeToBranch": "main",
             "ExtraSwitches": "-QuietComments"
         }
     }