Add Joseph Palermo as lead to the FI WG

We elected Joseph some months ago as technical lead for the FI WG but forgot to update this page.

Author: beyhan

toc/working-groups/WORKING-GROUPS.md

@@ -139,7 +139,8 @@ The GitHub repos this WG manages in the `cloudfoundry` GitHub organization are t
 |                                                     | Leads            | Company | Profile                                 |
 | -------------------------------------------------------- | ---------------- | ------- | --------------------------------------- |
 | <img width="30px" src="https://github.com/beyhan.png"> | Beyhan Veli       | SAP  | [@beyhan](https://github.com/beyhan) |
-| <img width="30px" src="https://github.com/rkoster.png"> | Ruben Koster       | VMware  | [@rkoster](https://github.com/rkoster) |
+| <img width="30px" src="https://github.com/rkoster.png"> | Ruben Koster     | VMware  | [@rkoster](https://github.com/rkoster) |
+| <img width="30px" src="https://github.com/jpalermo.png"> | Joseph Palermo  | VMware  | [@jpalermo](https://github.com/jpalermo) |
 
 
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