master: workflows: change changeout@v2 -> checkout@v4.

.github/workflows/conda-ubuntu-macos.yml

@@ -29,7 +29,7 @@ jobs:
         os: ["ubuntu-latest"]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
 
     - name: Checkout submodules
       run: |

.github/workflows/conda-windows-clang.yml

@@ -24,7 +24,7 @@ jobs:
             compiler: clang-cl
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Checkout submodules
       run: |
         git submodule update --init

.github/workflows/conda-windows-eigen.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: windows-2019
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - uses: conda-incubator/setup-miniconda@v2
       with:
         activate-environment: conda_env

.github/workflows/conda-windows-v142.yml

@@ -23,7 +23,7 @@ jobs:
             os: windows-2019
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Checkout submodules
       run: |
         git submodule update --init

.github/workflows/ubuntu-macos.yml

@@ -13,7 +13,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest ]
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: set debug_which
         run: |
           mkdir build

.github/workflows/uraimo_linux.yml

@@ -21,7 +21,7 @@ jobs:
             distro: alpine_latest
     steps:
       - name: Check out repository code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Checkout uraimo
         uses: uraimo/run-on-arch-action@v2
       - name: set debug_which

.github/workflows/windows-msys2.yml

@@ -14,7 +14,7 @@ jobs:
       run:
         shell: msys2 {0}
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - uses: msys2/setup-msys2@v2
         with:
           msystem: MINGW64