feat(plant): tsys3 GPU temp sensor - match nouveau hwmon too [#763]

Maxwell card runs in-tree nouveau on kernel 7.0.14 (no proprietary
branch supports both 7.0 and Maxwell); regex widened with a
non-capturing alternation, template downstream unchanged.

Detail: https://projects.knownelement.com/issues/763

packages/plant_snmp.yaml

@@ -513,7 +513,7 @@ sensor:
     accept_errors: true
     unique_id: pfv_tsys3_gpu_temperature_raw
     value_template: >-
-      {% set m = value | regex_findall('(?s)nvidia.*?temp1:\s*\+?(-?\d+\.?\d*)') %}
+      {% set m = value | regex_findall('(?s)(?:nvidia|nouveau).*?temp1:\s*\+?(-?\d+\.?\d*)') %}
       {{ m | first | float if m }}
 
   - platform: snmp