[BUG] The Footer on Add Expenses and Add Todo pages is not correctly placed at the bottom

[lakshyagrg23]

The Footer on Add Expenses and Add Todo pages is not properly placed at the bottom of the webpage which is leaving blank space at the bottom of the pages.
I can fix the footer to be displayed at the bottom of the page as it is expected to be.

Check List

• [✅] I am contributing under GSSoC-ext
• [✅] I am contributing under hacktoberfest
• [✅] I follow contribution guidelines

[lakshyagrg23]

Kindly review the PR and add the Level 1/2/3 label after assigning the task