docker: bump oven/bun from 1.1.27-alpine to 1.1.28-alpine in /excalidraw (#3759)
Bumps oven/bun from 1.1.27-alpine to 1.1.28-alpine.
---
updated-dependencies:
- dependency-name: oven/bun
dependency-type: direct:production
update-type: version-update:semver-patch
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