Make types documentation more explicit

UPGRADING.md

@@ -3,7 +3,7 @@
 ### Upgrading to version 0.95.0+
 
 * TypeScript type exports changed significantly. While `import Knex from 'knex';` used to import the knex instantiation function, the namespace and the interface for the knex instantiation function/object, there is now a clear distinction between them:
-```
+```typescript
 import { knex } from 'knex' // this is a function that you call to instantiate knex
 import { Knex } from 'knex' // this is a namespace, and a type of a knex object
 import KnexTimeoutError = Knex.KnexTimeoutError; // this is a class from the Knex namespace
@@ -12,6 +12,22 @@ const config: Knex.Config = {} // this is a type from the Knex namespace
 const knexInstance: Knex = knex(config)
 ```
 
+If your code looked like this:
+```typescript
+import knex from 'knex'
+
+const config: knex.Config = {} // this is a type from the Knex namespace
+const knexInstance = knex(config)
+```
+
+Change it to
+```typescript
+import { knex, Knex } from 'knex'
+
+const config: Knex.Config = {} // this is a type from the Knex namespace
+const knexInstance = knex(config)
+```
+
 * TypeScript version 4.1+ is needed when using knex types now.
 
 * MSSQL driver was completely reworked in order to address the multitude of connection pool, error handling and performance issues. Since the new implementation uses `tedious` library directly instead of `mssql`, please replace `mssql` with `tedious` in your dependencies if you are using a MSSQL database.