Fix image links

Author: Nathan Seidle

README.md

@@ -2,11 +2,11 @@ SparkFun Qwiic Button Arduino Library [![Build Status](https://travis-ci.org/spa
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 <table class="table table-hover table-striped table-bordered">
   <tr align="center">
-   <td><a href="https://www.sparkfun.com/products/15584"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/0/15584-Qwiic_Button_-_Red-01.jpg"></a></td>
-   <td><a href="https://www.sparkfun.com/products/15585"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/1/15585-Qwiic_Button_-_Blue-02.jpg"></a></td>
-   <td><a href="https://www.sparkfun.com/products/15591"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/8/15591-Qwiic_Arcade_-_Red-01.jpg"></a></td>
-   <td><a href="https://www.sparkfun.com/products/15592"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/9/15592-Qwiic_Arcade_-_Blue-01.jpg"></a></td>
-   <td><a href="https://www.sparkfun.com/products/15586"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/2/15586-Qwiic_Switch__without_microswitch_-01.jpg"></a></td>
+   <td><a href="https://www.sparkfun.com/products/15584"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/0/15584-Qwiic_Button_-_Red-01a.jpg"></a></td>
+   <td><a href="https://www.sparkfun.com/products/15585"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/1/15585-Qwiic_Button_-_Blue-02a.jpg"></a></td>
+   <td><a href="https://www.sparkfun.com/products/15591"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/8/15591-Qwiic_Arcade_-_Red-01a.jpg"></a></td>
+   <td><a href="https://www.sparkfun.com/products/15592"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/9/15592-Qwiic_Arcade_-_Blue-01a.jpg"></a></td>
+   <td><a href="https://www.sparkfun.com/products/15586"><img src="https://cdn.sparkfun.com//assets/parts/1/4/1/9/2/15586-Qwiic_Switch__without_microswitch_-01a.jpg"></a></td>
   </tr>
   <tr align="center">
     <td><a href="https://www.sparkfun.com/products/15584">SparkFun Qwiic Button - Red (SPX-15584)</a></td>