Bump actions/upload-artifact from 6 to 7 (#4116)

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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/build-wheels.yml

@@ -183,7 +183,7 @@ jobs:
           python -m simple503 --base-url file:///shared simple
 
       - name: Upload simple503-test artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: simple503-test-${{ matrix.os }}
           path: simple/*
@@ -206,7 +206,7 @@ jobs:
             /bin/bash -l -c "pip install impi-rt fenics-dolfinx[test] && mpiexec -n 2 python -m pytest -m 'not adios2 and not petsc4py' /dolfinx/python/test/unit"
 
       - name: Upload wheelhouse artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: wheelhouse-${{ matrix.os }}
           path: wheelhouse/*
@@ -216,7 +216,7 @@ jobs:
           python -m simple503 --base-url http://packages.fenicsproject.org/simple simple
 
       - name: Upload simple503 artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: simple503-${{ matrix.os }}
           path: simple/*

.github/workflows/ccpp.yml

@@ -326,13 +326,13 @@ jobs:
           doxygen Doxyfile
           make html
       - name: Upload C++ Doxygen documentation artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: docs-cpp-doxygen
           path: cpp/doc/html
           retention-days: 2
       - name: Upload C++ Sphinx documentation artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: docs-cpp-sphinx
           path: cpp/doc/build/html
@@ -343,7 +343,7 @@ jobs:
           cd python/doc
           python -m sphinx -W -b html source/ build/html/
       - name: Upload Python documentation artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: docs-python
           path: python/doc/build/html