Add glossary to integration in Opower (#42387)

Author: smarthome-10

source/_integrations/opower.markdown

@@ -16,7 +16,7 @@ ha_integration_type: integration
 ha_quality_scale: bronze
 ---
 
-The Opower integration allows you to get energy information from utilities that use [Opower](https://www.oracle.com/industries/utilities/opower-energy-efficiency/).
+The Opower {% term integration %} allows you to get energy information from utilities that use [Opower](https://www.oracle.com/industries/utilities/opower-energy-efficiency/).
 
 More than 175 utilities use Opower. Currently only the following utilities are supported by this integration: