Bump actions/checkout from 2 to 6 (#1050)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v2...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Davide Faconti <davide.faconti@gmail.com>

Author: dependabot[bot]

.github/workflows/cmake_ubuntu.yml

@@ -23,7 +23,7 @@ jobs:
         os: [ubuntu-22.04]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
 
     - name: Install Conan
       id: conan

.github/workflows/cmake_ubuntu_sanitizers.yml

@@ -25,7 +25,7 @@ jobs:
         sanitizer: [asan_ubsan, tsan]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v6
 
     - name: Install Conan
       id: conan

.github/workflows/cmake_windows.yml

@@ -23,7 +23,7 @@ jobs:
         os: [windows-latest]
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Install Conan
       id: conan

.github/workflows/pixi.yaml

@@ -17,7 +17,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       # Pixi is the tool used to create/manage conda environment
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
+      - uses: prefix-dev/setup-pixi@v0.8.1
       - uses: prefix-dev/setup-pixi@v0.9.3
         with:
           pixi-version: v0.40.3

.github/workflows/pre-commit.yaml

@@ -11,14 +11,14 @@ jobs:
   pre-commit:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
     - uses: pre-commit/action@v3.0.1
 
   clang-tidy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: Install LLVM 21
       run: |

.github/workflows/ros2-rolling.yaml

@@ -15,7 +15,7 @@ jobs:
           - {ROS_DISTRO: rolling, ROS_REPO: main}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - uses: 'ros-industrial/industrial_ci@master'
         env: ${{matrix.env}}
         with:

.github/workflows/ros2.yaml

@@ -16,7 +16,7 @@ jobs:
           - {ROS_DISTRO: jazzy, ROS_REPO: main}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
       - uses: 'ros-industrial/industrial_ci@master'
         env: ${{matrix.env}}
         with: