EnergyConsumptionDetails needs a supertype: Intangible

/cc #2670

Thanks to Hans Polak for catching this, see
https://lists.w3.org/Archives/Public/public-schemaorg/2020Aug/0007.html

data/ext/pending/issue-2670.ttl

@@ -13,6 +13,7 @@
   rdfs:label "EnergyConsumptionDetails" ;
   :category "issue-2670" ;
   :isPartOf <http://pending.schema.org> ;
+  rdfs:subClassOf :Intangible ;
   :source <https://github.com/schemaorg/schemaorg/issues/2670> ;
   rdfs:comment "EnergyConsumptionDetails represents information related to the energy efficiency of a product that consumes energy. The information that can be provided is based on international regulations such as for example [EU directive 2017/1369](https://eur-lex.europa.eu/eli/reg/2017/1369/oj) for energy labeling and the [Energy labeling rule](https://www.ftc.gov/enforcement/rules/rulemaking-regulatory-reform-proceedings/energy-water-use-labeling-consumer) under the Energy Policy and Conservation Act (EPCA) in the US" .