Modify parse_json macro to use try

Author: llifoawing

macros/database_specific_helpers/parse_json.sql

@@ -7,7 +7,7 @@
 {%- endmacro %}
 
 {% macro snowflake__parse_json(field) -%}
-    parse_json({{ field }})
+    try_parse_json({{ field }})
 {%- endmacro %}
 
 {% macro bigquery__parse_json(field) -%}