[Code scan] Correct the BSD license name in the About page

[njzjz]

This issue comes from a Codex global scan of deepmodeling/tbplas at commit 4d3652b.

Severity: Medium

The About page says TBPLaS is released under “BSD license 2.0”, but the included license text is the three-clause BSD license, including the non-endorsement clause. The license label is inaccurate and can confuse downstream users reviewing licensing.

Code references:

tbplas/doc/source/about/index.rst

Lines 123 to 128 in 4d3652b

	License
	-------
	TBPLaS is release under the BSD license 2.0, the complete content of which is as following:
	.. include:: license.rst

https://github.com/deepmodeling/tbplas/blob/4d3652b3dba8eb930e4869a6d41074f62d703692/LICENSE.rst#L6-L11

Suggested fix: update the About page to identify the license as BSD 3-Clause.