Bump minja with call blocks support, remove chat template fallback for MiniCPM3-4B

[yatarkan]

This PR bumps the minja library to a version with call blocks support and removes the chat template fallback for the MiniCPM3-4B model.

[Copilot]

Pull Request Overview

This PR bumps the minja library to a version with call blocks support and removes the chat template fallback for the MiniCPM3-4B model.

• Updates minja library to commit 3e4c61c616eda133cfb1e440fc7a14bf1729bbee for call blocks support
• Removes the MiniCPM3-4B chat template fallback mapping from the fallback map

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/cpp/CMakeLists.txt	Updates minja GIT_TAG to newer commit with call blocks support
src/cpp/src/tokenizer/chat_template_fallback_map.hpp	Removes the MiniCPM3-4B chat template fallback entry from the mapping array

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