Update jupyter-jupyterlab-server to version 2.15.0 / rev 9 via SR 993389
    
    https://build.opensuse.org/request/show/993389
    by user bnavigator + dimstar_suse
    - Update to 2.15.0
      * Suppress tornado 6.2 beta warnings #285 (@blink1073)
      * Add compat for openapi-core 0.15 #281 (@blink1073)
    - Release 2.14.0
      * proper setup for the fallback logger #269 (@rvalieris)
      * Switch to hatch backend #274 (@blink1073)
    - Release 2.13.0
      * Audit uses of print #261 (@blink1073)
      * Switch to importlib.metadata to list entry points #264
        (@fcollonval)
      * Add git-blame-ignore-revs #258 (@blink1073)
    - Release 2.12.0
      * Make openapi optional and lazy #253 (@blink1073)
      * Adds notebook_starts_kernel option to make "canStartKernel"
        configurable #248 (@jweill-aws)
      * Clean up tests and add public openapi_spec #247 (@blink1073)
    - Release 2.11.2
      * Resolve paths in tests #245 (@blink1073)
    - Release 2.11.1
      * Restore pytest_plugin #243 (@blink1073)
    - Rele