updated with excel installer image

Author: patrickboateng

README.md

@@ -27,7 +27,10 @@ provided [here](https://github.com/geolysis-dev).
 > [!IMPORTANT]
 > The `geolysis.excel` (an Excel Add-in), is available to install from the
 > Microsoft AppSource Store using this installer
-> link: [https://appsource.microsoft.com/en-us/product/Office365/WA200009428](https://appsource.microsoft.com/en-us/product/Office365/WA200009428)
+>
+link: [https://appsource.microsoft.com/en-us/product/Office365/WA200009428](https://appsource.microsoft.com/en-us/product/Office365/WA200009428)
+
+![geolysis-excel-appsource](./geolysis-installer-appsource.png)
 
 `geolysis` has only one project dependency which
 is [func-validator](https://github.com/patrickboateng/func-validator/)