Change 'Data Source' to 'Data source' for consistency

Author: v-kamat

ui/src/utils/language.ts

@@ -393,7 +393,7 @@ const ENGLISH_STRINGS: { [key in STRING]: string } = {
   [STRING.FIELD_LABEL_SOURCE_IMAGE]: 'Source image',
   [STRING.FIELD_LABEL_SOURCE_IMAGES]: 'Source images',
   [STRING.FIELD_LABEL_SOURCE_IMAGES_COLLECTION]: 'Source images collection',
-  [STRING.FIELD_LABEL_DATA_SOURCE]: 'Data Source',
+  [STRING.FIELD_LABEL_DATA_SOURCE]: 'Data source',
   [STRING.FIELD_LABEL_SAMPLE_CAPTURES]: 'Sample images',
   [STRING.FIELD_LABEL_SCORE]: 'Score',
   [STRING.FIELD_LABEL_SNAPSHOTS]: 'Snapshots',