Bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  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/build_wheels.yml

@@ -20,7 +20,7 @@ jobs:
           CIBW_ARCHS_LINUX: x86_64
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux_2_28
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: dist_linux_x86_64
           path: ./wheelhouse/*.whl
@@ -38,7 +38,7 @@ jobs:
           CIBW_ARCHS_LINUX: aarch64
           CIBW_MANYLINUX_AARCH64_IMAGE: manylinux_2_28
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: dist_linux_aarch64
           path: ./wheelhouse/*.whl
@@ -55,7 +55,7 @@ jobs:
         env:
           CIBW_ARCHS_MACOS: arm64
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: dist_macos15_arm64
           path: ./wheelhouse/*.whl
@@ -83,7 +83,7 @@ jobs:
 
       - name: upload sdist
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: dist_sdist
           path: dist/*.tar.gz

.github/workflows/test-linux-cxx-only.yml

@@ -92,7 +92,7 @@ jobs:
 
       - name: upload test log
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: libcasm-mapping-cxx-test-log
           path: build_cxx_test/Testing/Temporary/LastTest.log

.github/workflows/test-linux.yml

@@ -75,7 +75,7 @@ jobs:
 
       - name: upload docs
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: libcasm-mapping-docs
           path: python/doc/_build/html

.github/workflows/test-macos-build.yml

@@ -40,7 +40,7 @@ jobs:
 
       - name: upload libcasm-mapping-macos-latest-x86_64-dist
         if: always()
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: libcasm-mapping-macos-latest-x86_64-dist
           path: dist