Update main.yml

Author: sharmas0104

.github/workflows/main.yml

@@ -28,7 +28,7 @@ jobs:
       - name: 💎 Setup ruby
         uses: ruby/setup-ruby@v1
         with:
-          ruby-version: 2.7
+          ruby-version: '2.7.8'
 
       - name: 🔨 Install gems & build site
         uses: limjh16/jekyll-action-ts@v2