Merge pull request hidakatsuya#43 from chimpanstache/update-readme-according-to-latest-package-version

Update readme workflow file instructions

Author: hidakatsuya

README.md

@@ -7,7 +7,7 @@ A GitHub Action to install [diff-pdf](https://github.com/vslavik/diff-pdf).
 ## Usage
 
 ```yaml
-- uses: hidakatsuya/setup-diff-pdf@v1
+- uses: hidakatsuya/action-setup-diff-pdf@v1.2.0
   with:
     diff-pdf-version: '0.5'
 ```