ci: binary: Upgrade upload-artifact to v4

I got an email saying v3 is being deprecated this month. Looks like it's
upgrade time!

Author: danobi

.github/workflows/binary.yml

@@ -25,7 +25,7 @@ jobs:
         cp ./result bpftrace
 
     - name: Upload appimage
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
         name: bpftrace
         path: ./bpftrace