Fix all grammar

I didn't realise it wasn't just the first line.

README.md

@@ -2,26 +2,26 @@
 
 Dynamic and Configurable Lockscreen with Customizable UI and Shader Support
 
-This tools foundation builds heavily on the concepts and design
+This tool's foundation builds heavily on the concepts and design
 in [RobinMcCorkell's Shaderlock](https://github.com/RobinMcCorkell/shaderlock)
 so credit to him for his original creation.
 
 ### Features
-  - Blazingly Fast 🔥
-  - Simple and Easy to Use
-  - Shader Support for Infinite Possibilities
-  - Uses The Official [ext-session-lock-v1 protocol](https://wayland.app/protocols/ext-session-lock-v1)
-  - Comes Installed with an Assortment of Pretty Shaders
+  - Blazingly fast 🔥
+  - Simple and easy to use
+  - Shader support for infinite possibilities
+  - Uses the official [ext-session-lock-v1 protocol](https://wayland.app/protocols/ext-session-lock-v1)
+  - Comes installed with an assortment of pretty shaders
 
 ### Installation
 
-Install Build Dependencies (Ubuntu)
+Install build dependencies (Ubuntu)
 
 ```bash
 $ sudo apt install build-essential make cmake pkg-config llvm libclang-dev libpam-dev libxkbcommon-dev
 ```
 
-Compile and Install Binaries
+Compile and install binaries
 
 ```bash
 $ make install