[BUG] `swanlab.log` tag should support “Space”

## 🐛 Bug description [Please make everyone to understand it]

```python
import swanlab

swanlab.init()

swanlab.log({'train loss': 1})
```

## 👾 Expected result

Write down the results you expect

## 🚑 Any additional [like screenshots]

- **SwanLab Version**: v0.1.4

- **Platform**: MacOs M1Max