build(deps): bump actions/upload-artifact from 4 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v4...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>

.github/workflows/build.yml

@@ -106,7 +106,7 @@ jobs:
         run: tar zcf sources.tar.gz sources
 
       - name: Archive Source Bundle
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: source-bundle
           path: sources.tar.gz
@@ -182,7 +182,7 @@ jobs:
                 ./cibuild.sh -c -A -N -R -S testlist/${{matrix.boards}}.dat
             fi
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         if: ${{ always() }}
         with:
           name: linux-${{matrix.boards}}-builds
@@ -243,7 +243,7 @@ jobs:
           cd sources/nuttx/tools/ci
           ./cibuild.sh -i -c -A -R testlist/${{matrix.boards}}.dat
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: macos-${{matrix.boards}}-builds
           path: buildartifacts/
@@ -324,7 +324,7 @@ jobs:
           cd sources/nuttx/tools/ci
           ./cibuild.sh -g -i -A -C -R testlist/${{matrix.boards}}.dat
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: msys2-${{matrix.boards}}-builds
           path: buildartifacts/