docs(blog): change pg_graphql to inline code

apps/www/_blog/2023-04-19-whats-new-in-pg-graphql-v1-2.mdx

@@ -79,7 +79,7 @@ Filtering in SQL is endlessly flexible. We’ve taken two incremental steps to b
 ### `is null` and `is not null`
 
 Handling `null` values can be tricky in both SQL and GraphQL. However, there are similarities we can take advantage of.
-In pg_graphql, every scalar data type has its own filter type, such as `IntFilter` and `StringFilter`.
+In `pg_graphql`, every scalar data type has its own filter type, such as `IntFilter` and `StringFilter`.
 Each of these filter types now includes an `is` argument, which allows you to filter based on whether a value is null or not null.
 You can do this by using `{is: NULL}` for `null` values and `{is: NOT_NULL}` for non-`null` values.