fix: migrate heroku oauth connection to new oauth connection format

docs/integrations/app-connections/heroku.mdx

@@ -24,7 +24,7 @@ Infisical supports two methods for connecting to Heroku: **OAuth** and **Auth To
           ![Heroku config applications](/images/integrations/heroku/integrations-heroku-config-applications.png)
           ![Heroku config new app](/images/integrations/heroku/integrations-heroku-config-new-app.png)
 
-          Create the API client. As part of the form, set the **OAuth callback URL** to `https://your-domain.com/integrations/heroku/oauth2/callback`.
+          Create the API client. As part of the form, set the **OAuth callback URL** to `https://your-domain.com/organization/app-connections/heroku/oauth/callback`.
 
           <Tip>
             The domain you defined in the OAuth callback URL should be equivalent to the `SITE_URL` configured in your Infisical instance.
@@ -39,8 +39,8 @@ Infisical supports two methods for connecting to Heroku: **OAuth** and **Auth To
 
           Back in your Infisical instance, add two new environment variables for the credentials of your Heroku API client:
 
-          - `CLIENT_ID_HEROKU`: The **Client ID** of your Heroku API client.
-          - `CLIENT_SECRET_HEROKU`: The **Client Secret** of your Heroku API client.
+          - `INF_APP_CONNECTION_HEROKU_OAUTH_CLIENT_ID`: The **Client ID** of your Heroku API client.
+          - `INF_APP_CONNECTION_HEROKU_OAUTH_CLIENT_SECRET`: The **Client Secret** of your Heroku API client.
 
           Once added, restart your Infisical instance and use the Heroku Connection.
         </Step>

docs/self-hosting/configuration/envars.mdx

@@ -672,6 +672,16 @@ You can configure third-party app connections for re-use across Infisical Projec
 
 </Accordion>
 
+<Accordion title="Heroku OAuth Connection">
+    <ParamField query="INF_APP_CONNECTION_HEROKU_OAUTH_CLIENT_ID" type="string" default="none" optional>
+        The Application ID of your Heroku OAuth application.
+    </ParamField>
+
+    <ParamField query="INF_APP_CONNECTION_HEROKU_OAUTH_CLIENT_SECRET" type="string" default="none" optional>
+        The Secret of your GitLab Heroku OAuth application.
+    </ParamField>
+</Accordion>
+
 ## Native Secret Integrations
 
 To help you sync secrets from Infisical to services such as Github and Gitlab, Infisical provides native integrations out of the box.