Impossible to change an HTML page's Title

[annetre]

Describe the bug

An HTML page title includes "rst page title" + "html_title" (from conf.py)
I can modify only the second part (in conf.py) but I cannot change the title template.
For example, I want not to generate the first part ("rst page title"). How can I implement this?

I use sphinx-book-theme 0.3.3

Thank you

Reproduce the bug

no steps

List your environment

No response