Fixed a typo in Contributing chapter

Signed-off-by: aeberhardo <aeberhard@gmx.ch>

laravel/documentation/contrib/command-line.md

@@ -88,7 +88,7 @@ Next, commit the changes to the repository:
 
 	# git commit -s -m "I added some more stuff to the Localization documentation."
 
-- **-s** means that you are signing-off on your commit with your name. This tells the Laravel team know that you personally agree to your code being added to the Laravel core.
+- **-s** means that you are signing-off on your commit with your name. This lets the Laravel team know that you personally agree to your code being added to the Laravel core.
 - **-m** is the message that goes with your commit. Provide a brief explanation of what you added or changed.
 
 <a name="pushing-to-your-fork"></a>

laravel/documentation/contrib/tortoisegit.md

@@ -76,7 +76,7 @@ Now that you have finished coding and testing your changes, it's time to commit
 -  Right-click the Laravel directory and goto **Git Commit -> "feature/localization-docs"…**
 - Commit
   - **Message:** Provide a brief explaination of what you added or changed
-  - Click **Sign** - This tells the Laravel team know that you personally agree to your code being added to the Laravel core
+  - Click **Sign** - This lets the Laravel team know that you personally agree to your code being added to the Laravel core
   - **Changes made:** Check all changed/added files
   - Click **OK**