chore(deps): update peter-evans/create-pull-request action to v8

Author: renovate[bot]

.github/workflows/update.yaml

@@ -42,7 +42,7 @@ jobs:
         run: deno task test
 
       - name: Create pull request
-        uses: peter-evans/create-pull-request@v7
+        uses: peter-evans/create-pull-request@v8
         with:
           commit-message: "chore(deps): Update deno dependencies"
           title: Update Deno dependencies