chore(ci): bump the actions group across 1 directory with 2 updates

Bumps the actions group with 2 updates in the / directory: [actions/checkout](https://github.com/actions/checkout) and [KyleMayes/install-llvm-action](https://github.com/kylemayes/install-llvm-action).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

Updates `KyleMayes/install-llvm-action` from 2.0.7 to 2.0.8
- [Release notes](https://github.com/kylemayes/install-llvm-action/releases)
- [Changelog](https://github.com/KyleMayes/install-llvm-action/blob/master/CHANGELOG.md)
- [Commits](KyleMayes/install-llvm-action@v2.0.7...v2.0.8)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: KyleMayes/install-llvm-action
  dependency-version: 2.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: actions
...

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

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
       RUST_MIN_STACK: 20971520
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true
 
@@ -37,7 +37,7 @@ jobs:
 
       - name: Install LLVM and Clang
         if: startsWith(matrix.os, 'windows')
-        uses: KyleMayes/install-llvm-action@v2.0.7
+        uses: KyleMayes/install-llvm-action@v2.0.8
         with:
           version: "13.0"
           directory: ${{ runner.temp }}/llvm

.github/workflows/docs.yml

@@ -17,7 +17,7 @@ jobs:
       RUST_MIN_STACK: 20971520
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           submodules: true