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] <[email protected]>

.github/workflows/ci.yml

@@ -158,7 +158,7 @@ jobs:
         run: GZIP=-9 tar -czf echidna.tar.gz -C $APPDATA/local/bin/ echidna.exe
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: echidna-${{ runner.os }}
           path: echidna.tar.gz
@@ -172,7 +172,7 @@ jobs:
 
       - name: Upload testsuite
         if: runner.os != 'macOS'
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: echidna-testsuite-${{ runner.os }}
           path: echidna-testsuite*

.github/workflows/release.yml

@@ -73,7 +73,7 @@ jobs:
           tar -czf "echidna-${{ steps.version.outputs.version }}-${{ matrix.tuple }}.tar.gz" -C ./redistributable/bin/ echidna
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: echidna-redistributable
           path: echidna-${{ steps.version.outputs.version }}-${{ matrix.tuple }}.tar.gz