doc: fix missing lalign in table

references are listed in the table below.

| Material         | Parameter                                                           | Electrons           | Holes               | References                       |

|:-----------------|:--------------------------------------------------------------------|:--------------------|:--------------------|----------------------------------|

|:-----------------|:--------------------------------------------------------------------|:--------------------|:--------------------|:---------------------------------|

| Silicon          | $`v_{sat,300}\ [\text{cm}\,\text{s}^{-1}]`$                         | $`1.02\times 10^7`$ | $`0.72\times 10^7`$ | \[[@quay]\]                      |

|                  | $`A`$                                                               | $`0.74`$            | $`0.37`$            | \[[@quay]\]                      |

|                  | $`M\ [\text{cm}^2\,\text{K}^\gamma\,\text{V}^{-1}\,\text{s}^{-1}]`$ | $`1.43\times 10^9`$ | $`1.35\times 10^8`$ | \[[@jacoboni]\]                  |