Small fixes

Signed-off-by: Charles de Dreuille <charles.dedreuille@gmail.com>

.github/vale/config/vocabularies/Backstage/accept.txt

@@ -280,6 +280,7 @@ modularization
 monorepo
 Monorepo
 monorepos
+monospace
 morgan
 msgraph
 msw

docs-ui/src/app/theming/page.mdx

@@ -226,7 +226,7 @@ color of your app.
 
 ### Foreground colors
 
-Foreground colours are meant to work in pair with a background colours. Typeically this would work
+Foreground colours are meant to work in pair with a background colours. Typically this would work
 for icons, texts, shapes, ... Use a matching name to know what foreground color to use. These colors
 are prefixed with `fg` to make it easier to identify.
 

docs/conf/user-interface/index.md

@@ -178,7 +178,7 @@ These colors are used for the background of your application. We are mostly usin
 
 #### Foreground colors
 
-Foreground colours are meant to work in pair with a background colours. Typeically this would work for icons, texts, shapes, ... Use a matching name to know what foreground color to use. These colors are prefixed with `fg` to make it easier to identify.
+Foreground colours are meant to work in pair with a background colours. Typically this would work for icons, texts, shapes, ... Use a matching name to know what foreground color to use. These colors are prefixed with `fg` to make it easier to identify.
 
 | Token Name               | Description                                                       |
 | ------------------------ | ----------------------------------------------------------------- |

docs/dls/component-design-guidelines.md

@@ -104,7 +104,3 @@ accessibility.
 [8]: https://v4.mui.com/customization/palette/#default-values
 [9]: https://v4.mui.com/customization/typography/
 [10]: https://backstage.io/docs/conf/user-interface
-
-<!-- [11]: https://backstage.io/docs/getting-started/app-custom-theme#overriding-backstage-and-material-ui-components-styles -->
-
-[12]: https://v4.mui.com/customization/default-theme/#explore