deps-ci: bump actions/checkout from 6 to 7

Bumps [actions/checkout](https://github.com/actions/checkout) from 6 to 7.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -38,7 +38,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -52,7 +52,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -91,7 +91,7 @@ jobs:
           rust: stable
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
 
     - name: Install suitesparse
@@ -129,7 +129,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install dependencies
       run: |
@@ -147,7 +147,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -162,7 +162,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -194,7 +194,7 @@ jobs:
           rust: stable
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: true}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable
@@ -213,7 +213,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
       with: {submodules: false}
     - name: Install rust
       uses: dtolnay/rust-toolchain@stable

.github/workflows/codecov.yml

@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v6
+      uses: actions/checkout@v7
 
     - name: Install rust
       uses: actions-rs/toolchain@v1