[gha] Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -92,7 +92,7 @@ jobs:
           targets: __NONE__  # Only run preflights
 
       - name: Retrieve results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ERC_Output
           path: generated
@@ -118,7 +118,7 @@ jobs:
           targets: __NONE__  # Only run preflights
 
       - name: Retrieve results
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: DRC_Output
           path: generated
@@ -146,19 +146,19 @@ jobs:
           verbose: 0  # use 3 for debugging
 
       - name: Upload bill of materials files as artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: bom
           path: bom_files_compressed
 
       - name: Upload schematic files as artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: schematics
           path: schematics
 
       - name: Upload schematic files as artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: gerber_files
           path: gerber_files_compressed