chore(deps): update dependency line-bot-sdk to ~=3.21.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
line-bot-sdk	~=3.20.0 -> ~=3.21.0

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Release Notes

line/line-bot-sdk-python (line-bot-sdk)

v3.21.0: Support mark as read by token API

Compare Source

What's Changed

• Support mark as read by token API by @​github-actions[bot] in #​880

Support for "Mark as Read" by Token API

We have released a new Mark as Read API that allows developers to mark a user’s messages as read.
Previously, this functionality was available only to partners, but it is now publicly available.

When your server receives a user message via Webhook, the MessageContent will include a new field: markAsReadToken.
By calling the Mark as Read API with this token, all messages in the chat room up to and including that message will be marked as read.

Note: This feature assumes that your service uses the chat feature through Official Account Manager.
If chat is not enabled, messages from users are automatically marked as read, making this API unnecessary.

For more details, please refer to the release note: https://developers.line.biz/en/news/2025/11/05/mark-as-read/

(original PR is line/line-openapi#115)

Example

line_bot_api.mark_messages_as_read_by_token(
    MarkMessagesAsReadByTokenRequest(
        mark_as_read_token=event.message.mark_as_read_token
    )
)

line-openapi updates

Dependency updates

• fix(deps): update dependency ch.qos.logback:logback-classic to v1.5.20 by @​renovate[bot] in #​874
• chore(deps): update github artifact actions (major) by @​renovate[bot] in #​876
• fix(deps): update dependency org.openapitools:openapi-generator to v7.17.0 by @​renovate[bot] in #​878

Full Changelog: line/line-bot-sdk-python@v3.20.0...v3.21.0

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This release is prepared by @​habara-k

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[github-actions]

✅ Backend requirements.txt updated

Generated from backend/uv.lock using uv export --no-hashes --frozen > requirements.txt

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