Bump actions/upload-artifact from 6 to 7 (#295)

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/runcpptest.yaml

@@ -82,7 +82,7 @@ jobs:
           python run_all.py -t -g ${{ matrix.compiler }} -c ${{ matrix.core }} -avh $AVH_FVP_PLUGINS/../bin
 
       - name: Upload test report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-cpp-report_${{ matrix.compiler }}_${{ matrix.core }}
           path: dsppp/${{ matrix.compiler }}_results/errors_${{ matrix.core }}.txt

.github/workflows/runneontest.yaml

@@ -98,7 +98,7 @@ jobs:
           python ../processResult.py --noerr -e -f ../Output_f16.pickle -r result_f16.txt -html > result_f16.html 
 
       - name: Upload test report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: neon-test-report
           path: |

.github/workflows/runtest.yaml

@@ -77,7 +77,7 @@ jobs:
           python runall.py -s -g ${{ matrix.compiler }} -avh $AVH_FVP_PLUGINS/../bin
 
       - name: Upload test report
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: test-report_${{ matrix.compiler }}
           path: Testing/cmsis_build/summary_${{ matrix.compiler }}.html