Update README.md (bluesky-social#115)

* Update README.md

The word "documentation" was misspelt.

* Update architecture.md

Add "at a low cost to users" on line 120

* Remove language around DID Consortium costs

README.md

@@ -129,7 +129,7 @@ The number in parantheses tells you which terminal to run each command in. From
 ```
 
 ## 🗒️ Documentation
-We have not put together detailed coumentation for the server API or the SDK because the APIs are expected to change soon.
+We have not put together detailed documentation for the server API or the SDK because the APIs are expected to change soon.
 
 If you are inclined to play with either, your best bet is to check the tests to see how to use each part of the library.
 
@@ -180,4 +180,4 @@ UCAN permissions are also simplified at the current moment, allowing for scoped
 
 In the architecture overview, we specify three client types: full, light, and delegator. This library only contains implementations of full and delegator. Thus we use delegator for light weight operations and a full client when we want the entire repository. 
 
-The main ramification of this is that data server subscribers must receive the _full repo_ of the users that they subscribe to. Once we add in light clients, they can receive only the _sections_ of the repo that they are interested in (for instance a single post or a like) while having the same trust model as a full repo.
+The main ramification of this is that data server subscribers must receive the _full repo_ of the users that they subscribe to. Once we add in light clients, they can receive only the _sections_ of the repo that they are interested in (for instance a single post or a like) while having the same trust model as a full repo.