fix: switch - minor grammar correction (#5342)

Author: geurts

components/switch/README.md

@@ -105,5 +105,5 @@ If an activity is set to `Visible` but also has other conditions affecting its v
 
 ## Accessbility
 
-- When `text-position` is set to `hidden`, the required `text` will be used for the switch's hidden label so that it is [accessible](https://www.w3.org/WAI/WCAG22/quickref/#name-role-value) to non-sighted users.
-- `d2l-switch-visibility` is a notable exception to the best practice of having a static term as the label; this was done to provide more clarity in situations where there are external conditions that could influence whether or not the content in question is visible.
+- When `text-position` is set to `hidden`, the required `text` will be used for the switch's hidden label so that it is [accessible](https://www.w3.org/WAI/WCAG22/quickref/#name-role-value) to non-sighted users
+- `d2l-switch-visibility` is a notable exception to the best practice of having a static term as the label; this was done to provide more clarity in situations where there are external conditions that could influence whether or not the content in question is visible