Bump actions/checkout from 3 to 4

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 4.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/check.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     name: stable / fmt
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install stable
@@ -34,7 +34,7 @@ jobs:
       matrix:
         toolchain: [stable, beta]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -50,7 +50,7 @@ jobs:
     runs-on: ubuntu-latest
     name: nightly / doc
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install nightly
@@ -63,7 +63,7 @@ jobs:
   #   runs-on: ubuntu-latest
   #   name: ubuntu / stable / features
   #   steps:
-  #     - uses: actions/checkout@v3
+  #     - uses: actions/checkout@v4
   #       with:
   #         submodules: true
   #     - name: Install stable
@@ -82,7 +82,7 @@ jobs:
         msrv: ["1.70.0"]
     name: ubuntu / ${{ matrix.msrv }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.msrv }}

.github/workflows/prod.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - name: Rsync files to server
         uses: Pendect/[email protected]

.github/workflows/test.yml

@@ -33,7 +33,7 @@ jobs:
           - 5432:5432
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
       - name: Install ${{ matrix.toolchain }}
@@ -61,7 +61,7 @@ jobs:
   #   runs-on: ubuntu-latest
   #   name: ubuntu / stable / minimal-versions
   #   steps:
-  #     - uses: actions/checkout@v3
+  #     - uses: actions/checkout@v4
   #       with:
   #         submodules: true
   #     - name: Install stable
@@ -88,7 +88,7 @@ jobs:
   #     #   if: runner.os == 'Windows'
   #     # - run: vcpkg install openssl:x64-windows-static-md
   #     #   if: runner.os == 'Windows'
-  #     - uses: actions/checkout@v3
+  #     - uses: actions/checkout@v4
   #       with:
   #         submodules: true
   #     - name: Install stable
@@ -103,7 +103,7 @@ jobs:
   #   runs-on: ubuntu-latest
   #   name: ubuntu / stable / coverage
   #   steps:
-  #     - uses: actions/checkout@v3
+  #     - uses: actions/checkout@v4
   #       with:
   #         submodules: true
   #     - name: Install stable