Update taiki-e/install-action digest to 50708e9

Author: renovate[bot]

.github/actions/lint-toml/action.yml

@@ -5,7 +5,7 @@ runs:
   using: "composite"
   steps:
     - name: Install taplo
-      uses: taiki-e/install-action@6cc14f7f2f4b3129aff07a8b071d2d4f2733465d # v2
+      uses: taiki-e/install-action@50708e9ba8d7b6587a2cb575ddaa9a62e927bc06 # v2
       with:
         tool: taplo