docs: Updated nearby search required parameters (#434)

Author: tranceraver

specification/parameters/places/radius.yml

@@ -29,5 +29,6 @@ description: |
 
 schema:
   type: number
+required: true
 in: query
 example: 1000

specification/parameters/places/type.yml

@@ -23,4 +23,5 @@ description: |
   <div class="note">Note: Adding both `keyword` and `type` with the same value (`keyword=cafe&type=cafe` or `keyword=parking&type=parking`) can yield `ZERO_RESULTS`.</div>
 schema:
   type: string
+required: true
 in: query