Bump actions/checkout from 3 to 4 (#395)

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -19,7 +19,7 @@ jobs:
     name: Deploy
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - uses: actions/setup-python@v4

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     name: Test
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - uses: actions/setup-python@v4
       with:
         python-version: '3.x'