Adds action to update README on new backer

.github/workflows/sponsors.yml

@@ -0,0 +1,29 @@
+name: Generate Sponsors README
+on:
+  workflow_dispatch:
+  schedule:
+    - cron: 30 15 * * 0-6
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Generate Sponsors
+        uses: JamesIves/github-sponsors-readme-action@v1
+        with:
+          token: ${{ secrets.SPONSORS_PAT }}
+          file: "README.md"
+          minimum: 500
+          maximum: 9900
+          marker: "backers"
+          organization: true
+
+      # Here we can eventually add sponsors too rather than just backers
+
+      - name: Deploy to GitHub Pages 🚀
+        uses: JamesIves/github-pages-deploy-action@v4
+        with:
+          branch: main
+          folder: "."

README.md

@@ -70,6 +70,8 @@ Support Vapor's development by [becoming a sponsor](https://github.com/sponsors/
 ### 💚 Backers
 Support Vapor's development by [becoming a backer](https://github.com/sponsors/vapor).
 
+<!-- backers -->
+
 <a 
     data-amt="50" 
     data-since="10/09/20" 
@@ -437,6 +439,8 @@ Support Vapor's development by [becoming a backer](https://github.com/sponsors/v
     <img src="https://avatars.githubusercontent.com/u/1652009?s=120" width="60px">
 </a>
 
+<!-- backers -->
+
 <a href="https://opencollective.com/vapor/backer/0/website" target="_blank"><img src="https://opencollective.com/vapor/backer/0/avatar.svg"></a>
 <a href="https://opencollective.com/vapor/backer/1/website" target="_blank"><img src="https://opencollective.com/vapor/backer/1/avatar.svg"></a>
 <a href="https://opencollective.com/vapor/backer/2/website" target="_blank"><img src="https://opencollective.com/vapor/backer/2/avatar.svg"></a>