Update workflows

Author: ptth222

.github/workflows/codecov.yml

@@ -15,7 +15,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6

.github/workflows/documentation.yml

@@ -8,7 +8,7 @@ jobs:
   publish-documentation:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: '3.x'

.github/workflows/pypi.yml

@@ -15,8 +15,8 @@ jobs:
   publish-package:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+      - uses: actions/checkout@v6
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.x'
       - name: Install dependencies

.github/workflows/tests.yml

@@ -16,7 +16,7 @@ jobs:
         os: [ ubuntu-latest, windows-latest, macOS-latest ]
     runs-on: ${{matrix.os}}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v6
       with: