updated all abtc members for the term 1237

[Kriti1400]

Notion ticket link

Updating ABTC

Implementation description

• added / updated all 15 members of ABTC with the 1237 tag and updated pictures when required

Steps to test

1. run the code locally and navigate to the students tab
2. scroll down to ABTC to see the updates changes

What should reviewers focus on?

• check that all 15 people were added correctly

Checklist

• My PR name is descriptive and in imperative tense
• My commit messages are descriptive and in imperative tense. My commits are atomic and trivial commits are squashed or fixup'd into non-trivial commits
• I have run the appropriate linter(s)
• I have requested a review from the PL, as well as other devs who have background knowledge on this PR or who will be building on top of this PR

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[pranavishal]

Nice work !