docs: fix previous and next links in the getting started section

[aversini]

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[github-actions]

Bundle Size (components)

Status	File	Size (Gzip)	Limits
✅	style.css	7.37 KB	8 KB
✅	index.js	10.99 KB (-23 B -0.20%)	12 KB
✅	vendor.js	66.34 KB	67 KB

Overall bundle size: 84.71 KB (-23 B -0.03%)
Overall status: ✅

Bundle Size (fingerprint)

Status	File	Size (Gzip)	Limits
✅	index.js	3.94 KB (-1 B -0.02%)	4 KB
✅	vendor.js	44.34 KB	45 KB

Overall bundle size: 48.28 KB (-1 B 0.00%)
Overall status: ✅

Bundle Size (form components)

Status	File	Size (Gzip)	Limits
✅	index.js	9.54 KB (-10 B -0.10%)	20 KB
✅	vendor.js	44.46 KB	67 KB

Overall bundle size: 54 KB (-10 B -0.02%)
Overall status: ✅

Bundle Size (system)

Status	File	Size (Gzip)	Limits
✅	style.css	2.74 KB	8 KB
✅	index.js	1.93 KB (+2 B +0.10%)	3 KB
✅	vendor.js	44.46 KB	46 KB

Overall bundle size: 49.13 KB (+2 B 0.00%)
Overall status: ✅