housekeeping: update issue template for new workflow, add branch mirroring

.github/issue_template.md

@@ -1,7 +1,6 @@
 Prior to submitting a new issue make sure to complete these steps:
 
-- [ ] Checkout the `dev` branch and confirm the issue is present there as well.
-      The `dev` branch contains fixes that may not have been merged to `master` yet.
-- [ ] Post the syntax you are using (default/mediawiki/markdown) **and** your vimwiki settings from your `.vimrc`
+- [ ] Include the VimWiki settings from your `.vimrc`
+- [ ] Include the syntax you are using (default / Markdown / MediaWiki) 
 - [ ] Provide a detailed description of the problem including **steps to reproduce the issue**.
 - [ ] Include the output of `:VimwikiShowVersion`.

.github/workflows/mirror.yml

@@ -0,0 +1,17 @@
+on:
+  push:
+    branches:
+      - 'dev'
+
+jobs:
+  mirror_job:
+    runs-on: ubuntu-latest
+    name: Mirror SOURCE_BRANCH_NAME branch to DESTINATION_BRANCH_NAME branch
+    steps:
+    - name: Mirror action step
+      id: mirror
+      uses: google/mirror-branch-action@v1.0
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        source: 'dev'
+        dest: 'master'