How many times will the lift force of an airship change if hydrogen is replaced with gel?

Although hydrogen is half the weight of helium, the lift will not increase much: lift
the ball is equal to the difference between the Archimedean force and the force of gravity acting on the gas filling the ball: F = p * g * V – p * g * V. Here V is the volume of the ball; p is the density of air, helium and hydrogen, respectively.
Hence:
F / F = (p – P) / (p – P) = 1.08.
Thus, as a result of replacing helium with hydrogen, the lift will increase by only 8%. Since hydrogen can ignite at the slightest leak, it is practically not used to fill balloons.