Update WhoAreWe.md (#290)

I stumbled over a broken link. This should fix it (the correct URL is used at other places on the website already, so I guess it changed on its way, and was not updated here.)

This commit also corrects a couple of tiny typos.

Author: ShalokShalom

src/homepage/WhoAreWe.md

@@ -1,12 +1,12 @@
 We are a group of **independent individuals**, not tied to any organisation, with an **ambition to see `F#` grow**.  
 What brought us together is our aspiration to make an **actual difference** in the **F# open-source** landscape.  
-United we can take this F# ecosystem to the next level. By **hand-ons collaboration** and targeted efforts.
+United, we can take this F# ecosystem to the next level. By **hands-on collaboration** and targeted efforts.
 
 ## Enter the hive
 
-The world of _open-source software can be quite overwhelming_ to get your feet wet in. There is a lot to learn and you might not be confident that you can contribute actually code changes.
+The world of _open-source software can be quite overwhelming_ to get your feet wet in. There is a lot to learn, and you might not be confident that you can actually contribute code changes.
 
-Just like when starting a new job, you need to learn a new codebase. An open-source project is no different. You can read more about this experience in [Edgar's testimonial](/testimonials/edgar-gonzalez/).
+Just like when starting a new job, you need to learn a new codebase. An open-source project is no different. You can read more about this experience in [Edgar's testimonial](/testimonials/edgargonzalez/).
 
 And that is why we want to invoke our collective hive-mind to help people get started.
 We want to guide you as best as we can to scratch your own itch in the open-source space.