[cxx_status] Mark P0732R2 as only 'partial', not 'Clang 12', as some of

the changes were reverted.

Author: zygoloid

clang/www/cxx_status.html

@@ -1005,7 +1005,7 @@ <h2 id="cxx20">C++20 implementation status</h2>
  <tr>
  <td rowspan="2">Class types as non-type template parameters</td>
  <td><a href="https://wg21.link/p0732r2">P0732R2</a></td>
- <td rowspan="2" class="unreleased" align="center">Clang 12</td>
+ <td rowspan="2" class="partial" align="center">Partial</td>
  </tr>
  <tr> <!-- from Belfast -->
  <td><a href="https://wg21.link/p1907r1">P1907R1</a></td>