Update CompatHelper yml

Author: CiaranOMara

.github/workflows/CompatHelper.yml

@@ -7,18 +7,24 @@ jobs:
   CompatHelper:
     runs-on: ubuntu-latest
     steps:
+      - name: "Add the General registry via Git"
+        run: |
+          import Pkg
+          ENV["JULIA_PKG_SERVER"] = ""
+          Pkg.Registry.add("General")
+        shell: julia --color=yes {0}
       - name: "Install CompatHelper"
         run: |
           import Pkg
           name = "CompatHelper"
           uuid = "aa819f21-2bde-4658-8897-bab36330d9b7"
-          version = "2"
+          version = "3"
           Pkg.add(; name, uuid, version)
         shell: julia --color=yes {0}
       - name: "Run CompatHelper"
         run: |
           import CompatHelper
-          CompatHelper.main(master_branch = "master")
+          CompatHelper.main()
         shell: julia --color=yes {0}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}