Fix projects collection output config

[pragnyanramtha]

Summary

• Fix the projects collection option in _config.yml from ouput to output
• Allows Jekyll to emit the existing _projects collection entries

Tests

• python static check for projects.output: true and absence of ouput
• git diff --check

Notes

• Full Jekyll build was not run because Ruby is not installed in this workspace.

Closes #26

[Copilot]

Pull request overview

Fixes a Jekyll configuration typo that prevented the _projects collection from being written to the built site, restoring publication of existing project entries.

Changes:

• Correct _config.yml collection key from ouput → output for projects, enabling Jekyll to emit the collection content.

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