Fixing documentation bugs in ds, dbms & ui/ux

[SaileePhal]

IMPORTANT: When creating your Pull Request, please use the following format for the title: Category - Resource Name & Section

PR Title samples:

• Data Science - Technologies
• DBMS -Interview
• UI/UX -Figma resources

Closes Issue

Closes #280

Description:

--Data Science
--Fixing Bug in Data Science Readme.md File
---typing error
--Data Scientist - under Technologies
--consider - under Youtube Channel
Original:

After change:

---DBMS (small documentation fix)
--typing errors under Interview
--HackerRank (not Hackerrank)
Original:

After Change:

---UI/UX
---typing error of freebiesui and uxcrush under Figma resources
--It should be
--Freebies (not FreesbieUI)
--uxcrush (one word - not ux crush) (small documentation fix)
Original:

After change:

Resource URL:

NA

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