Bump actions/checkout from 1 to 6 (#86)

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v1...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] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/focal_build.yml

@@ -29,7 +29,7 @@ jobs:
       TARGET_CMAKE_ARGS: "-DCMAKE_BUILD_TYPE=Debug -DTESSERACT_ENABLE_TESTING=ON"
       CTEST_OUTPUT_ON_FAILURE: 1
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space
         run: |

.github/workflows/nightly.yml

@@ -42,7 +42,7 @@ jobs:
              DOWNSTREAM_CMAKE_ARGS: "-DCMAKE_BUILD_TYPE=Release"}
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v6
 
       - name: Free Disk Space
         run: |

.github/workflows/wheels.yml

@@ -77,7 +77,7 @@ jobs:
     env:
       DEBIAN_FRONTEND: noninteractive
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         path: ws/src/tesseract_python
     - name: install sudo, tzdata, keyboard-configuration
@@ -195,7 +195,7 @@ jobs:
             cmake_arch: x64
             python_version: "3.13.0"
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         path: ws/src/tesseract_python
     - uses: actions/setup-python@v4
@@ -308,7 +308,7 @@ jobs:
           brew_prefix: /opt/homebrew
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         path: ws/src/tesseract_python
     - uses: actions/setup-python@v4
@@ -391,7 +391,7 @@ jobs:
       - build-macos
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         path: robotraconteur
     - name: Download CI artifacts

.github/workflows/windows_noetic_build.yml

@@ -16,7 +16,7 @@ jobs:
       ROS_DISTRO: noetic
       CTEST_OUTPUT_ON_FAILURE: 1
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
         path: src/tesseract_python