Fix typo in layout_styles.rst

[interifter]

Caught a couple typos while reading the docs.

1:

Take this line:

If you need to customize the css definitions, there are twi ways of doing it:

and correct it:

If you need to customize the css definitions, there are two ways of doing it:

2:

Correct this line:

<table class="need needs_grid_simple needs_layout_complex needes_style_blue docutils" id="SPEC_1">

to this:

<table class="need needs_grid_simple needs_layout_complex needs_style_blue docutils" id="SPEC_1">

[danwos]

Awesome. Thanks for these fixes! 👍