substring should be lowercase (#84682)

packages/grafana-data/src/transformations/matchers/valueMatchers/substringMatchers.ts

@@ -6,7 +6,7 @@ import { BasicValueMatcherOptions } from './types';
 
 const isSubstringMatcher: ValueMatcherInfo<BasicValueMatcherOptions> = {
   id: ValueMatcherID.substring,
-  name: 'Contains Substring',
+  name: 'Contains substring',
   description: 'Match where value for given field is a substring to options value.',
   get: (options) => {
     return (valueIndex: number, field: Field) => {