bump share_plus dependency to version 12.0.1

[Memet18]

This pull request updates the share_plus package to the latest available version. The update resolves the issue where the Share button does not work on iOS.

Related Issue
Fixes #440

Changes
Updated share_plus to the latest version in pubspec.yaml

Notes
The iOS share functionality was affected by a known bug in older versions of share_plus. Updating the package resolves the problem.

Summary by Sourcery

Update the talker_flutter package to use the latest patch version of the share_plus dependency.

Bug Fixes:

• Resolve an iOS issue where the Share button could fail due to a bug in the previous share_plus version.

Build:

• Bump the share_plus dependency from 12.0.0 to 12.0.1 in pubspec.yaml.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR bumps the share_plus dependency in the talker_flutter package from 12.0.0 to 12.0.1 to pick up an upstream bugfix that restores iOS share button functionality.

File-Level Changes

Change	Details	Files
Update the share_plus dependency to the latest patch release to fix iOS share behavior.	Incremented the share_plus version constraint from ^12.0.0 to ^12.0.1 in the talker_flutter package dependencies. Relies on upstream bugfixes in share_plus 12.0.1 that address the non-working Share button on iOS.	packages/talker_flutter/pubspec.yaml

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#440	Update the share_plus dependency to a version that fixes the iOS share button bug (so that the native iOS share sheet opens correctly).	✅

Possibly linked issues

• Share button does not work on iOS #440: PR updates share_plus to 12.0.1, resolving the iOS Share button malfunction described in the issue.
• Share button does not work on iOS #440: PR updates share_plus to 12.0.1, resolving the incompatibility caused by older share_plus constraints in talker_flutter.

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[sourcery-ai]

Hey there - I've reviewed your changes and they look great!

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[Frezyx]

Hello @Memet18 !
I will merge this PR in near future