Major.minor versions that end with 0 like 1.30 are truncated like floats

### Problem statement

When a version that ends with `0` like `1.30` is used in the config e.g.

```
render:
kubernetesVersion: 1.30
```

then it will be truncated like a float number, i.e. `1.3`.

### Workaround

Use quotation marks:

```
render:
kubernetesVersion: "1.30"
```

### Proposed solution

Handle this inside `crd-ref-docs` so that users are not surprised.