compat: raise max_version to support NetBox 4.7

Extends the declared version range (min_version stays 4.6.5) and
updates the plugin description to reflect 4.7 support. The plugin's
internal-API monkeypatches (rack elevation SVG, DeviceEditView form)
should be regression-tested against a live NetBox 4.7.1 install, as
those are the areas most likely to break across minor releases.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

netbox_utilities/__init__.py

@@ -11,7 +11,7 @@ class NetBoxUtilitiesConfig(PluginConfig):
     author = "LKE"
     base_url = "utilities"
     min_version = "4.6.5"
-    max_version = "4.6.99"
+    max_version = "4.7.99"
     default_settings = {
         "navigation_customization_enabled": True,
         "connection_vlans_enabled": True,