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](actions/upload-artifact@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>

Author: dependabot[bot]

.github/workflows/concepts-duckdb.yml

@@ -38,7 +38,7 @@ jobs:
         run: |
           duckdb "$GITHUB_WORKSPACE/mimic4.db" -c ".read duckdb.sql"
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: duckdb-db
           path: mimic4.db

.github/workflows/concepts-psql.yml

@@ -61,7 +61,7 @@ jobs:
         run: |
           pg_dump --no-owner --no-privileges --schema=mimiciv_derived -f derived.sql
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: psql-derived
           path: derived.sql