ci: add retag workflow

.github/workflows/retag.yml

@@ -0,0 +1,22 @@
+name: re-tag
+
+on:
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: |
+          Tag to be updated or created
+        required: true
+        default: 'v2'
+
+jobs:
+  retag:
+    name: Re-tag
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - run: |
+        git push origin :refs/tags/${{ inputs.tag }}
+        git tag -f ${{ inputs.tag }}
+        git push origin main --tags