Merging changes synced from https://github.com/MicrosoftDocs/power-platform-pr (branch live)

Author: buck1ey

.acrolinx-config.edn

@@ -1,4 +1,4 @@
-{:allowed-branchname-matches ["^master$", "demo-master-3"]
+{:allowed-branchname-matches ["^main$"]
  :allowed-filename-matches ["power-platform" "power-virtual-agents"]
  :use-skip-label true
  :targets

.openpublishing.publish.config.json

@@ -49,13 +49,13 @@
     {
       "path_to_root": "_themes",
       "url": "https://github.com/Microsoft/templates.docs.msft",
-      "branch": "master",
+      "branch": "main",
       "branch_mapping": {}
     },
     {
       "path_to_root": "_themes.pdf",
       "url": "https://github.com/Microsoft/templates.docs.msft.pdf",
-      "branch": "master",
+      "branch": "main",
       "branch_mapping": {}
     }
   ],
@@ -64,7 +64,7 @@
       "Publish",
       "Pdf"
     ],
-    "master": [
+    "main": [
       "Publish",
       "Pdf"
     ],