Update action.yml

Author: fechanique

action.yml

@@ -1,10 +1,10 @@
-name: 'Salesforce DX CLI Action'
+name: 'Salesforce SFDX CLI Action'
 author: Felipe Echanique Torres
-description: 'This action allows to use Salesforce DX CLI from GitHub Actions'
+description: 'This action allows to use Salesforce SFDX CLI from GitHub Actions'
 inputs:
   sfdx-auth-url:
     description: Authorize a Salesforce org using an SFDX auth URL
-    required: true
+    required: false
 runs:
   using: 'node12'
   main: 'index.js'