📝 Fix broken links in docs

[YuriiMotov]

Currently on main we have 2 broken links in docs:

INFO    -  Doc file 'tutorial/create-db-and-table-with-db-browser.md' contains a link './index.md#create-a-project', but the doc 'tutorial/index.md' does not contain an anchor '#create-a-project'.
INFO    -  Doc file 'tutorial/create-db-and-table.md' contains a link './index.md#create-a-python-virtual-environment', but the doc 'tutorial/index.md' does not contain an anchor '#create-a-python-virtual-environment'.

https://github.com/fastapi/sqlmodel/actions/runs/18385627235/job/52383213256#step:10:22

[github-actions]

📝 Docs preview

Last commit 4d43ee6 at: https://4c0e61dc.sqlmodel.pages.dev

Modified Pages

• https://4c0e61dc.sqlmodel.pages.dev/tutorial/create-db-and-table-with-db-browser/ - (before)
• https://4c0e61dc.sqlmodel.pages.dev/tutorial/create-db-and-table/ - (before)