Change github action to setup ruby

Author: bishosilwal

.github/workflows/gempush.yml

@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v2
     - name: Set up Ruby 2.6
-      uses: actions/setup-ruby@v1
+      uses: ruby/setup-ruby@v1.126.0
       with:
         version: 2.6.5
 

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Set up Ruby 2.6
-        uses: actions/setup-ruby@v1
+        uses: ruby/setup-ruby@v1.126.0
         with:
           ruby-version: 2.6.5
       - name: Build and test with Rake