Update README.md with v2 instead of v1 (#733)

Author: escudero89

Diff for: README.md

@@ -165,7 +165,7 @@ In this two-step example, the first step will use OIDC to assume the role `arn:a
 
 ```yaml
     - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v1
+      uses: aws-actions/configure-aws-credentials@v2
       with:
         aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
         aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}