[API Docs] Add Backlink to "Vector Stores" and fix grammatical error

[beKoool]

• What kind of change does this PR introduce?
  ->📄Docs Update: [API Documentation] Add backlink to Vector Stores and Fix Grammar #508
  -> 👍This PR changes the API-docs.md file.
  -> 🔥 It fixes some grammatical errors in /api/task_status section.

• Why was this change needed?
  -> 🚀This change was needed to fix the grammatical error seen in the API Docs.

• Other information:
  🙏 Please accept my pull request with the label "hacktoberfest-accepted" 🏷️ and additionally assign the label "hacktoberfest" 🎃 to issue [API Documentation] Add backlink to Vector Stores and Fix Grammar #508.

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[dartpain]

Please remove the link on the vectorstores, I think it will only confuse people.

Thank you!

[beKoool]

Hey @dartpain, I removed link to Vector stores. Should I make new wiki page on this PR or should i create a new PR for it?

[dartpain]

Yes please create a new issue for the vectorstore guide, thank you
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[beKoool]

Thank you so much @dartpain !!