Bump actions/download-artifact from 5 to 6

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/linux-gcc-musl.yml

@@ -70,7 +70,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/linux-gcc.yml

@@ -120,7 +120,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/linux-llvm.yml

@@ -64,7 +64,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/linux-mingw.yml

@@ -68,7 +68,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/macos-gcc.yml

@@ -93,7 +93,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/windows-mingw.yml

@@ -79,7 +79,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}
 

.github/workflows/windows-vs2022.yml

@@ -69,7 +69,7 @@ jobs:
         fetch-depth: 0
 
     - name: Download artifacts
-      uses: actions/download-artifact@v5
+      uses: actions/download-artifact@v6
       with:
         name: ${{ matrix.arch }}