Changed the English instance of "keyphrase" to "key phrase"

Author: garycentric

articles/search/cognitive-search-working-with-skillsets.md

@@ -292,7 +292,7 @@ The inline shaping approach does not require a shaper skill as all shapes needed
 ]
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-One observation from both the approaches is how values of `"Keyphrases"` are projected using the `"sourceContext"`. The `"Keyphrases"` node, which contains a collection of strings, is itself a child of the page text. However, because projections require a JSON object and the page is a primitive (string), the `"sourceContext"` is used to wrap the keyphrase into an object with a named property. This technique enables even primitives to be projected independently.
+One observation from both the approaches is how values of `"Keyphrases"` are projected using the `"sourceContext"`. The `"Keyphrases"` node, which contains a collection of strings, is itself a child of the page text. However, because projections require a JSON object and the page is a primitive (string), the `"sourceContext"` is used to wrap the key phrase into an object with a named property. This technique enables even primitives to be projected independently.
 
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