home-assistant: fix update-component-packages.py

We don't want to use the versioned attribute python3Packages.av_13 even
though we override av to be that package.

pkgs/servers/home-assistant/update-component-packages.py

@@ -39,6 +39,7 @@ PKG_SET = "home-assistant.python.pkgs"
 # If some requirements are matched by multiple or no Python packages, the
 # following can be used to choose the correct one
 PKG_PREFERENCES = {
+    "av": "av",
     "fiblary3": "fiblary3-fork",  # https://github.com/home-assistant/core/issues/66466
     "HAP-python": "hap-python",
     "ha-av": "av",