docs(configuration.md): add workaround for xo5 interface issue

This commit adds an alternative way to configure XO so that it shows the XO5 interface instead of the XO6 interface, which is the new default.
In some cases, using relative paths would break the interface.

Signed-off-by: Thomas Moraine <thomas.moraine@vates.tech>

docs/docs/configuration.md

@@ -62,6 +62,20 @@ This configuration ensures:
 - Accessing `/v5` loads **XO 5**.
 - Accessing `/v6` loads **XO 6**.
 
+:::tip
+If the configuration above breaks the Xen Orchestra interface, try using absolute paths:
+
+```toml
+[http.mounts]
+# Uncomment to setup a default version.
+# Otherwise, XO5 will be the default for stable channel and XO6 for latest and source
+'/' = '/usr/local/lib/node_modules/xo-web/dist/'
+
+'/v5' = '/usr/local/lib/node_modules/xo-web/dist/'
+'/v6' = '/usr/local/lib/node_modules/@xen-orchestra/web/dist/'
+```
+:::
+
 ### Where to Place the Configuration File
 
 :::tip