Remove spaces / replace them with underscore for the links

[immadisairaj]

As per flame-engine/flame#2895 (comment), it is good that we have links generated with _ instead of (which turns out as %20).

Stories of ('Collision Detection') - Story ('Collidable AnimationComponent')

Current Link example:
Collision%20Detection_Collidable%20AnimationComponent

Expected Link example:
Collision_Detection_Collidable_AnimationComponent

[spydon]

Should I assign you to this @immadisairaj?

[immadisairaj]

Let it be open for others (for time being). But, there's a high chance I might work on it and send a PR (I will inform here if I start working on it).

[immadisairaj]

Please assign me this issue @spydon.

I found the issue and fixed it already 😅🙂