Update GitHub release automation (#6)

Co-authored-by: Daniel McKnight <[email protected]>

.github/workflows/propose_release.yml

@@ -0,0 +1,20 @@
+name: Propose Stable Release
+on:
+  workflow_dispatch:
+jobs:
+  update_version:
+    uses: neongeckocom/.github/.github/workflows/propose_dated_release.yml@master
+    with:
+      branch: dev
+      update_changelog: true
+      # Changelog automation fails with this large repo
+      version_file: "neon_minerva/version.py"
+
+  pull_changes:
+    uses: neongeckocom/.github/.github/workflows/pull_master.yml@master
+    with:
+      pr_reviewer: neonreviewers
+      pr_assignee: ${{ github.actor }}
+      pr_draft: false
+      pr_title: ${{ needs.update_version.outputs.version }}
+      pr_body: ${{ needs.update_version.outputs.changelog }}