Update templates/JSResolverOCHTTPSTemplate.js

Co-authored-by: Andrew Carbonetto <andrew.carbonetto@improving.com>

Author: flora-jin

templates/JSResolverOCHTTPSTemplate.js

@@ -18,7 +18,7 @@ const useCallSubquery = false;
 
 // TIMESTAMP HERE
 
-let schemaDataModelJSON = readFileSync('resolver.schema.graphql', 'utf-8');
+const schemaDataModelJSON = readFileSync('resolver.schema.graphql', 'utf-8');
 
 const schemaDataModel = JSON.parse(schemaDataModelJSON);