chore: switch dependabot, reviewers and email to arch-bom (#546)

Author: vgulati-apphelix

.github/dependabot.yml

@@ -6,4 +6,4 @@ updates:
     schedule:
         interval: "weekly"
     reviewers:
-      - "openedx/arbi-bom"
+      - "openedx/2u-arch-bom"

.github/workflows/upgrade-python-requirements.yml

@@ -13,9 +13,9 @@ jobs:
    call-upgrade-python-requirements-workflow:
     with:
        branch: ${{ github.event.inputs.branch }}
-       team_reviewers: "arbi-bom"
-       email_address: arbi-bom@edx.org  
-       send_success_notification: false
+       team_reviewers: "2u-arch-bom"
+       email_address: arch-bom-upgrade-prs@2u-internal.jsmalerts.atlassian.net
+       send_success_notification: true
     secrets:
        requirements_bot_github_token: ${{ secrets.REQUIREMENTS_BOT_GITHUB_TOKEN }}
        requirements_bot_github_email: ${{ secrets.REQUIREMENTS_BOT_GITHUB_EMAIL }}