update README.md with improved code snippet example and aicommit alias

diff:
diff --git a/README.md b/README.md
index dfd36c8..2e3d77f 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,10 @@
 Instead of `git commit -m your message here`
 ```bash
+git commit -m your message here
 ```
 ```bash
+aicommit
+
```

README.md

@@ -3,7 +3,11 @@
 clone this repo and then link the scripts into your path.
 
 ### use
-Instead of `git commit -m "your message here"`
+Instead of 
+
+```bash
+git commit -m "your message here"`
 ```
+```bash
 aicommit
 ```