Fix typos and grammar errors in documentation (#1919)

* Update YARN.md

* Update CHANGELOG.md

Author: anim001k

CHANGELOG.md

@@ -476,7 +476,7 @@ and this project adheres to
   to supported cases where users put very high gas values in there ([#1465]).
 - Drop support for Node.js 14 and add support for Node.js 20. ([#1421])
 - @cosmjs/tendermint-rpc: Remove `Adaptor` abstractions which are not needed
-  anymore by haing a dedicated client for each backend.
+  anymore by having a dedicated client for each backend.
 - @cosmjs/tendermint-rpc: Add
   `CometClient = Tendermint34Client | Tendermint37Client | Comet38Client` and
   `connectComet` for auto-detecting the right client for a provided endpoint.

docs/YARN.md

@@ -128,7 +128,7 @@ this ignore list when we revisit Plug‘n’Play.
 
 ## Step 8: Update Yarn CLI invocations and options in scripts
 
-If are using the Yarn CLI tool in any scripts you will need to update some
+If you are using the Yarn CLI tool in any scripts you will need to update some
 command and option names which have changed from v1 to v2. For example
 `--frozen-lockfile` has been deprecated in favour of `--immutable`. Other option
 changes weren’t covered in the official documentation, so have fun finding out
@@ -309,7 +309,7 @@ Remove what you put there before and add these:
 !.yarn/versions
 ```
 
-Basically we’re adding the cache and the `.pnp.js` file to VCS. It might seems
+Basically we’re adding the cache and the `.pnp.js` file to VCS. It might seem
 weird to add all those zip files to version control, but the reasoning is in the
 article listed above.