Update dependency robotframework-pythonlibcore to v4

Author: renovate[bot]

requirements.txt

@@ -6,7 +6,7 @@ idna==3.4
 lxml==4.9.2
 requests==2.28.2
 robotframework==6.0.2
-robotframework-pythonlibcore==2.2.1
+robotframework-pythonlibcore==4.1.1
 robotframework-selenium2library==3.0.0
 robotframework-seleniumlibrary==6.0.0
 selenium==4.8.1