Update README.md

Switch example to use v1.0

Author: thadguidry

README.md

@@ -4,7 +4,7 @@
 Add following step to your workflow:
 
 ```yaml
-- uses: dev-drprasad/delete-tag-and-release@v0.2.1 # PRERELEASE is v1.0 and can also be used to test and give us feedback
+- uses: dev-drprasad/delete-tag-and-release@v1.0 # PRERELEASE is v1.0 and can also be used to test and give us feedback
   with:
     tag_name: v0.1.0 #(required) tag name to delete 
     github_token: ${{ secrets.GITHUB_TOKEN }} # (required) a GitHub token with write access to the repo that needs to be modified