qemukit: fix assertion when multiple RPC commands are sent

Fixes #5477

UTM.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -42,7 +42,7 @@
       "location" : "https://github.com/utmapp/QEMUKit.git",
       "state" : {
         "branch" : "main",
-        "revision" : "6b823262f577cdf8d9e3edf7d8636ef7cd85c0cc"
+        "revision" : "d979cb5249f34e18de07e82496a004f8ff3bbd0e"
       }
     },
     {