chore(deps): Bump actions/upload-artifact from 4 to 7 (#8)

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

.github/workflows/scheduled-tests.yml

@@ -38,7 +38,7 @@ jobs:
 
       - name: Upload results on failure
         if: failure()
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: test-results-py${{ matrix.python-version }}
           path: |

.github/workflows/security.yml

@@ -53,7 +53,7 @@ jobs:
         bandit -c .bandit.yml -r rdagent/ -ll || true
 
     - name: Upload Bandit report
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@v7
       if: always()
       with:
         name: bandit-security-report