Update t2.txt with greeting messages

[Copilot]

This PR updates the content of t2.txt to include meaningful greeting messages, completing the requested updates to the project's text files.

Changes Made

Updated t2.txt from containing a simple placeholder "t2" to now containing:

hello world!
greetings from t2!

This change aligns t2.txt with the greeting-style content pattern established in t1.txt, which contains similar friendly messages ("hi there" and "hello!"). Both text files now have consistent, meaningful content rather than simple placeholders.

Context

As noted in the issue, t1.txt was previously updated and this PR addresses the pending update to t2.txt, completing the sequential update process for these text files in the project.

Original prompt

update t2.txt

TITLE: Updates to Text Files t1.txt and t2.txt
USER INTENT: The user aims to update the contents of two text files, t1.txt and t2.txt.
TASK DESCRIPTION: The user is making updates to the text files as part of their project, likely to improve or modify the existing content.
EXISTING: The user has initiated updates to t1.txt, which is being tracked in a pull request.
PENDING: The user has also requested an update to t2.txt, which has not yet been addressed.
CODE STATE:

• t1.txt: Updated and included in a pull request.
• t2.txt: Update requested but not yet completed.
  RELEVANT CODE/DOCUMENTATION SNIPPETS: None provided in the conversation.
  OTHER NOTES: The conversation indicates a sequential update process for the text files, with t1.txt already in progress and t2.txt pending further action.
  TITLE: Updating t2.txt file

Created from VS Code via the [GitHub Pull Request](https://marketplace.visualstudio.com/items?itemName=GitHub.vscode-pull-request-github) extension.

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