ChoicesModel View Update: Update the ending text message.

#### ChoicesModel View Update

##### Actual

Currently when running `./bin/dev.sh`, it shows a text message we want to update: **"(press q to quit)"**.

```
(base) chris@chris:~/Projects/graphql-compatibility/compatibility-base$ ./bin/dev.sh
┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ │
│ Reference Implementation: https://github.com/graphql/graphql-js/releases/tag/v0.6.0 │
│ (•) Implementation: https://github.com/graphql-go/graphql/releases/tag/v0.8.1 │
│ │
│ │
│ (press q to quit) │
│ │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
```

##### Expected

Let's update the last message from: **"(press q to quit)"** to **"(press enter to continue)"**.

In order to tell library users that they can continue the program workflow by pressing enter.

```
(base) chris@chris:~/Projects/graphql-compatibility/compatibility-base$ ./bin/dev.sh
┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ │
│ Reference Implementation: https://github.com/graphql/graphql-js/releases/tag/v0.6.0 │
│ (•) Implementation: https://github.com/graphql-go/graphql/releases/tag/v0.8.1 │
│ │
│ │
│ (press enter to continue) │
│ │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
```