Fix KaTeX equation numbering in notebook preview (#156276)
Fix KaTeX equation numbering in notebook preview (#156276)

Fixes https://github.com/microsoft/vscode/issues/155888
microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode