follow action name change

Author: hidakatsuya

.github/workflows/test.yml

@@ -24,7 +24,7 @@ jobs:
 
       - uses: actions/checkout@v3
 
-      - uses: hidakatsuya/setup-diff-pdf@v1
+      - uses: hidakatsuya/action-setup-diff-pdf@v1
         with:
           diff-pdf-version: "0.5"