add workflow to automatically bump the version

Signed-off-by: Michael Crenshaw <[email protected]>

.github/workflows/bump-major-version.yaml

@@ -0,0 +1,33 @@
+name: Bump major version
+on:
+  workflow_dispatch: {}
+
+permissions: {}
+
+jobs:
+  prepare-release:
+    permissions:
+      contents: write  # for peter-evans/create-pull-request to create branch
+      pull-requests: write  # for peter-evans/create-pull-request to create a PR
+    name: Automatically update major version
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@8410ad0602e1e429cee44a835ae9f77f654a6694  # v4.0.0
+        with:
+          fetch-depth: 0
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Run script to bump the version
+        run: |
+          hack/bump-major-version.sh
+
+      - name: Create pull request
+        uses: peter-evans/create-pull-request@5e914681df9dc83aa4e4905692ca88beb2f9e91f  # v7.0.5
+        with:
+          commit-message: "Bump major version"
+          title: "Bump major version"
+          body: Bumping major version
+          branch: bump-major-version
+          branch-suffix: random
+          signoff: true

hack/bump-major-version.sh

@@ -1,9 +1,6 @@
 #!/usr/bin/env bash
 
 # This script bumps the major version of Argo CD. Before cutting a new major release, run this script and open a PR.
-# If you have to make _any_ manual changes to the PR, this script should be updated to automate those.
-
-# This script is intended to be run from the root of the repository.
 
 # Get the current version from go.mod.
 CURRENT_VERSION=$(grep 'module github.com/argoproj/argo-cd' go.mod | awk '{print $2}' | sed 's/.*\/v//')