fix: allow jpeg files in image upload dialog in builderˆ

[vacekj]

Fixes: #2584

Description

fixes the image upload dialog in builder not accepting jpegs

Checklist

This PR:

• Includes only changes relevant to the original ticket. Significant refactoring needs to be separated.
• Doesn't disable eslint rules.
• Doesn't work around the type checker (including but not limited to: type casts, non-null assertions, @ts-ignore, unjustified optional values).
• Doesn't contain commented out code.
• If adding/updating a feature, it adds/updates its test script on Notion.

[vercel]

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Name	Status	Preview	Updated (UTC)
builder	✅ Ready (Inspect)	Visit Preview	Jan 12, 2024 1:16pm
builder-staging	✅ Ready (Inspect)	Visit Preview	Jan 12, 2024 1:16pm
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manager-staging	✅ Ready (Inspect)	Visit Preview	Jan 12, 2024 1:16pm

[gitstream-cm]

🥷 Code experts: gravityblast, digitalmnt

gravityblast has most 👩‍💻 activity in the files.
digitalmnt, gravityblast have most 🧠 knowledge in the files.

See details

packages/builder/src/components/base/ImageInput.tsx

Activity based on git-commit:

	gravityblast
JAN
DEC
NOV	3 additions & 2 deletions
OCT
SEP
AUG

Knowledge based on git-blame:
digitalmnt: 70%
gravityblast: 26%

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[gitstream-cm]

This PR is 50% new code.

[melissa-neira]

lgtm!