fix: typo fixes and grammar (#1090)

* Typo fixes and grammar.

* Additional fix.

rpc-tests/README.md

@@ -1,44 +1,44 @@
 # RPC tests
 
-This project aim to create tesing framework for astar rpc node. It achieve this by spawning a local network with zombienet a Simple CLI tool to launch a local Polkadot test network. [zombienet](https://github.com/paritytech/zombienet) take configuration for the test network in a `rpc-tests.toml` which describes the config of relaychains and parachains that needs to be started for test network to start.
+This project aims to create a testing framework for the astar RPC node. It achieves this by spawning a local network with `zombienet`, a Simple CLI tool to launch a local Polkadot test network. [zombienet](https://github.com/paritytech/zombienet) takes configuration for the test network in a `rpc-tests.toml` file, which describes the config of relaychains and parachains that the test network needs in order to start.
 
-After the test network is started tests can be performed by connecting to it using polkadot.js or web3.js.t
+After the test network is started, tests can be performed by connecting to it using `polkadot.js` or `web3.js`.
 
-The test suite has a global setup and teardown steps for the test network with zombienet. Then it runs the tests with `rpc-tests.zndsl` test suite runner.
+The test suite has global setup and teardown steps for the test network with zombienet. It runs the tests with the `rpc-tests.zndsl` test suite runner.
 
 ## Requirements
 
 - node.js 18+
-Download from https://nodejs.org/en/
+Download from `https://nodejs.org/en/`
 - yarn
-To install `npm install -g yarn`
+To install, run: `npm install -g yarn`
 
 ## Usage
 
-Build astar collator.
+Build astar collator:
 
 ```sh
 cargo build --release
 ```
 
-Copy the binary in rpc-tests/bin folder.
+Copy the binary in rpc-tests/bin folder:
 
 ```sh
 mkdir -p rpc-tests/bin
 cp target/release/astar-collator rpc-tests/bin/astar-collator
 ```
 
-Download and copy latest polkadot binary from https://github.com/paritytech/polkadot/releases to rpc-tests/bin folder
+Download and copy the latest polkadot binary from https://github.com/paritytech/polkadot/releases to the `rpc-tests/bin` folder.
 
-Download and copy latest zombienet binary from https://github.com/paritytech/zombienet/releases to rpc-tests/bin folder
+Download and copy the latest zombienet binary from https://github.com/paritytech/zombienet/releases to the `rpc-tests/bin` folder.
 
-To start the test suite.
+To start the test suite:
 
 ```sh
 cd rpc-tests
 ```
 
-For all runtime.
+For all runtime:
 
 ```sh
 yarn test