[jupyter] correctly handle TCanvases with same name

[linev]

Canvas name was used as identifier to track HTML element. If new canvas with same name was created, old HTML name was overwritten. Therefore add unique ID (pointer) to the canvas name to handle new canvas properly.

Also update jsroot link to latest version

[github-actions[bot]]

Test Results

    13 files      13 suites   3d 5h 32m 7s :stopwatch:  2 650 tests  2 634 :white_check_mark: 0 :zzz: 16 :x: 32 632 runs  32 614 :white_check_mark: 0 :zzz: 18 :x:

For more details on these failures, see this check.

Results for commit 07ec632b.