doc: fix typo in html_title
doc: fix typo in html_title

Reported-by: Ana Guerrero Lopez <b6edd3e5043d0ec8ce1663b61a47bb9c3fdab4d0@collabora.com>
Signed-off-by: Guillaume Tucker <e7e20b7c30f19d4ca6b81319ef81bf200369d137@collabora.com>

kernelci/kernelci-backend,kernelci/kernelci-backend