Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build_wheels.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout empyrical
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
           ref: ${{ inputs.version }}

.github/workflows/ci_tests.yml

@@ -16,7 +16,7 @@ jobs:
     name: Formatting Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: psf/black@stable
         with:
           options: "--check --diff"
@@ -27,7 +27,7 @@ jobs:
     name: Lint Check
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -51,7 +51,7 @@ jobs:
             python-version: "3.12"
     steps:
       - name: Checkout empyrical
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5

.github/workflows/codeql-analysis.yml

@@ -39,7 +39,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/conda_package.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout empyrical-reloaded
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup miniconda3
         uses: conda-incubator/setup-miniconda@v3

.github/workflows/test_wheels.yml

@@ -17,7 +17,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
 
       - name: Checkout empyrical
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
 #      - name: Install wheel & run tests
 #        run: |

.github/workflows/unit_tests.yml

@@ -14,7 +14,7 @@ jobs:
         python-version: ["3.10", "3.11", "3.12", "3.13" ]
     steps:
       - name: Checkout empyrical
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v5