Update integrations.mdx to fix h2 header (#126)

Author: atastycookie

tools/interactsh/integrations.mdx

@@ -15,7 +15,7 @@ sidebarTitle: 'Integrations'
 ![image](https://user-images.githubusercontent.com/8293321/135176099-0e3fa01c-bdce-4f04-a94f-de0a34c7abf6.png)
 
 
-##  ZAP Add-On
+## ZAP Add-On
 
 Interactsh can be used with OWASP ZAP via the [OAST add-on for ZAP](https://www.zaproxy.org/docs/desktop/addons/oast-support/). With ZAP's scripting capabilities, you can create powerful out-of-band scan rules that leverage Interactsh's features. A standalone script template has been provided as an example (it is added automatically when you install the add-on).
 
@@ -28,4 +28,4 @@ Interactsh can be used with OWASP ZAP via the [OAST add-on for ZAP](https://www.
 - See the [OAST add-on documentation](https://www.zaproxy.org/docs/desktop/addons/oast-support/) for more info.
 
 ![zap](https://user-images.githubusercontent.com/16446369/135211920-ed24ba5a-5547-4cd4-b6d8-656af9592c20.png)
-*Interactsh in ZAP*
+*Interactsh in ZAP*