Migrate from main.workflow to the new yml syntax (#8)

Author: BSKY

.github/main.workflow

@@ -0,0 +1,19 @@
+on:
+  schedules:
+    - cron: '*/10 * * * *'
+name: Update gist with latest tweet
+jobs:
+  update-gist:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: update-gist
+        uses: matchai/bird-box@master
+        env:
+          GH_TOKEN: ${{ secrets.GH_TOKEN }}
+          GIST_ID: 6d5f84419863089a167387da62dd7081
+          TWITTER_ACCESS_TOKEN_KEY: ${{ secrets.TWITTER_ACCESS_TOKEN_KEY }}
+          TWITTER_ACCESS_TOKEN_SECRET: ${{ secrets.TWITTER_ACCESS_TOKEN_SECRET }}
+          TWITTER_CONSUMER_KEY: ${{ secrets.TWITTER_CONSUMER_KEY }}
+          TWITTER_CONSUMER_SECRET: ${{ secrets.TWITTER_CONSUMER_SECRET }}
+          TWITTER_USER: matchai