Fix C lint errors in `@stdlib/stats/base/snanmax`

-   File: `lib/node_modules/@stdlib/stats/base/snanmax/examples/c/example.c`
-   Line: 25

### Current Code

```c
float x[] = { 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 0.0/0.0, 0.0/0.0 };
```

### Description

```plaintext
style: Variable 'x' can be declared as const array [constVariable]
```