Update docs/user-guide/about.md

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: bniladridas

docs/user-guide/about.md

@@ -105,7 +105,7 @@ Use this for:
 
 ```bash
 cargo build
-# Runs faster, larger binary
+# Slower runtime, faster compilation, larger binary
 ./target/debug/harper
 ```