fix(boards): case-sensitive board names in url

[Meierschlumpf]

Homarr

Thank you for your contribution. Please ensure that your pull request meets the following pull request:

• Builds without warnings or errors (pnpm build, autofix with pnpm format:fix)
• Pull request targets dev branch
• Commits follow the conventional commits guideline
• No shorthand variable names are used (eg. x, y, i or any abbrevation)

Closes #2218

Tried it out with board named GuGuS and was able to open it with /boards/gugus:

[deepsource-io]

Here's the code health analysis summary for commits f0b9324..6837c91. View details on DeepSource ↗.

Analysis Summary

Analyzer	Status	Summary	Link
JavaScript	✅ Success		View Check ↗

---

💡 If you’re a repository administrator, you can configure the quality gates from the settings.

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	23.07%	9676 / 41934
🔵	Statements	23.07%	9676 / 41934
🔵	Functions	29.55%	399 / 1350
🔵	Branches	65.2%	1162 / 1782

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
packages/api/src/router/board.ts	59.55%	82.16%	82.35%	59.55%	46-54, 57-64, 70-95, 171-240, 277-488, 507-511, 524-526, 529-531, 539, 729-923, 944-964, 1079-1094, 1183, 1202, 1213-1228, 1233-1234, 1256-1271, 1276-1277, 1296-1298, 1323-1325, 1416-1417, 1441-1442, 1546-1550, 1606-1607, 1615-1616

Generated in workflow #5317 for commit 6837c91 by the Vitest Coverage Report Action