Update CompatHelper.yml to version 3

Author: chriselrod

.github/workflows/CompatHelper.yml

@@ -12,7 +12,7 @@ jobs:
           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"
@@ -23,4 +23,4 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           COMPATHELPER_PRIV: ${{ secrets.DOCUMENTER_KEY }}
-          # COMPATHELPER_PRIV: ${{ secrets.COMPATHELPER_PRIV }}
+          # COMPATHELPER_PRIV: ${{ secrets.COMPATHELPER_PRIV }}