chore(deps): update github actions to v4 (#118)

Co-authored-by: Sichen Liu <lscmirror@gmail.com>

Author: renovate-bot

.github/workflows/assign-issues.yml

@@ -25,7 +25,7 @@ jobs:
       issues: write
     steps:
       - name: "Auto-assign issue"
-        uses: pozil/auto-assign-issue@70adb98ca8b3941524e9ecde48e89067c4f96736 # v3.0.0
+        uses: pozil/auto-assign-issue@07fe6dc0e9771842b428f5739098d6140734e226 # v4.0.0
         with:
           assignees: pl04351820
           numOfAssignee: 1

.github/workflows/assign-prs.yml

@@ -26,7 +26,7 @@ jobs:
       pull-requests: write
     steps:
       - name: "Auto-assign PR"
-        uses: pozil/auto-assign-issue@70adb98ca8b3941524e9ecde48e89067c4f96736 # v3.0.0
+        uses: pozil/auto-assign-issue@07fe6dc0e9771842b428f5739098d6140734e226 # v4.0.0
         with:
           assignees: pl04351820
           numOfAssignee: 1