[BUG/DOCS]: GitGraph support is unclear

[rajat-ht]

Describe the bug
The documentation site regarding GitGraphs includes support for directives like "showBranches: false" and "showCommitLabel: false", e.g. https://docs.mermaidchart.com/mermaid-oss/syntax/gitgraph.html#hiding-branch-names-and-lines. However, I have been unable to reproduce this behavior in the playground, mermaid.live, or on GitHub itself (which supports gitGraph). In fact the doc-site itself has a diagram in this section to illustrate the directive - but the diagram itself seems to lack support (branch names and lines are still evident):

To Reproduce
Described above.

Expected behavior
Expected branch names and lines to be toggleable by the documented directives, same with labels.

Screenshots
See above

Desktop (please complete the following information):

• OS: [e.g. iOS] macOS
• Browser [e.g. chrome, safari] Chrome and Safari
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
GitGraphs are great! Thanks!