Fixing the footer at the bottom

[mohitm15]

Title: Blockquote is not present in the Testimonial-C template

Fixes: #95

Description: This PR is regarding (#95 ) the position of the footer which is earlier not present at the bottom in all the Footer templates (both in light & dark mode).

What I Had Done:

I had fixed the footer at the bottom in all the Footer templates. I had also given some bottom margin so that the arrows & GitHub logo on the right-bottom corner should not get overlapped with the footer.

ScreenShot:

Dark mode

Before

After

As you can see, I had fixed the footer at the bottom in all the Footer templates.

Some more templates:

FooterB

FooterE