Unstable test in the `KernelMagicIT`

[stariy95]

Seems like some integration tests may be unstable, here's a failed run:

[INFO] 
[INFO] Results:
[INFO] 
Error:  Failures: 
Error:    KernelMagicIT.addMavenDependencies:56 
Expected: a string containing "dflib-jupyter-1.0.0-RC1.jar"
     but: was "Running JJava Kernel with args: [java, --add-opens, jdk.jshell/jdk.jshell=ALL-UNNAMED, -jar, /usr/share/jupyter/kernels/java/jjava.jar, /root/.local/share/jupyter/runtime/kernel-4307.json]
Jupyter console 6.6.3

Java 21.0.6+7-LTS :: JJava kernel 1.0-SNAPSHOT 
Protocol v5.3 implementation by unknown unknown
In [1]: 
In [2]: 
In [3]: Do you really want to exit ([y]/n)? 
Shutting down kernel
"
[INFO] 
Error:  Tests run: 14, Failures: 1, Errors: 0, Skipped: 0