chore: make description consistent

Also specify this is for getting aggregate stats, not "more thorough",
whatever that means.

Cargo.toml

@@ -3,7 +3,7 @@ name = "git-stats"
 version = "0.1.14"
 edition = "2021"
 authors = ["Luke Hsiao <luke@hsiao.dev>"]
-description = "A script for grabbing more thorough shortlog stats"
+description = "A tool for getting aggregated shortlog stats"
 repository = "https://github.com/lukehsiao/git-stats"
 homepage = "https://github.com/lukehsiao/git-stats"
 license = "BlueOak-1.0.0"

README.md

@@ -3,7 +3,7 @@
     git stats
 </h1>
 <div align="center">
-    <strong>A small script to get more thorough shortlog stats.</strong>
+    <strong>A tool for getting aggregated shortlog stats.</strong>
 </div>
 <br>
 <div align="center">
@@ -44,7 +44,7 @@ cargo install git-stats --locked
 ## Usage
 
 ```
-A script for grabbing more thorough shortlog stats
+A tool for getting aggregated shortlog stats
 
 Usage: git-stats [OPTIONS] [revision-range]