GITHUB: workflows/testing.yml: update to actions/upload-artifact@v4

Signed-off-by: Tim Janik <[email protected]>

.github/workflows/testing.yml

@@ -29,9 +29,9 @@ jobs:
     - name: 'Build Dist Assets'
       run: |
         misc/cirun -u 1000 make mkassets
-    - uses: actions/upload-artifact@v3.1.3
+    - uses: actions/upload-artifact@v4
       with: { name: assets, path: assets/ }
-    - uses: actions/upload-artifact@v3.1.3
+    - uses: actions/upload-artifact@v4
       with: { name: dist-tarball, path: assets/*.tar* }
     - name: 'Upload API Docs' # http://tim-janik.github.io/docs/anklang
       if: github.repository == 'tim-janik/anklang' && github.ref == 'refs/heads/trunk'
@@ -62,7 +62,7 @@ jobs:
         misc/cirun -u 1000 make -j`nproc` check
         misc/cirun -u 1000 make x11test-v
     # Artifact upload from x11test
-    - uses: actions/upload-artifact@v3.1.3
+    - uses: actions/upload-artifact@v4
       if: always()
       with: { name: "x11test", path: "out/x11test/" }
 
@@ -90,7 +90,7 @@ jobs:
       run: |
         misc/cirun -u 1000 make -j`nproc` clang-tidy
     # Artifact upload from clang-tidy
-    - uses: actions/upload-artifact@v3.1.3
+    - uses: actions/upload-artifact@v4
       with: { name: clang-tidy, path: out/clang-tidy/ }
     - name: 'Make branch-check'
       # Use non-0 exit status for a failing branch-check on PRs