Updating Book Button functionality in Exhibition

[kushthedude]

• [x] Included a screenshot showing after and before the changes.
• [x] Included a description of the change below.
• [x] Squashed the commits.

Changes done in this Pull Request

• Fixes #93

Description / Changes

-Updated the 'Book Booth' button functionality in the exhibition dropdown. -Referred to correct site address of booking booth.

---

[kushthedude]

@mariobehling , Sir please review this PR.

[mariobehling]

Already fixed using the forward URL.

[kushthedude]

@mariobehling Sorry sir,For the inconvenience caused.