fix badge style when logo only

[LitoMore]

Resolves #10628

It looks like there is no unit test for this. The badges below can used for previewing:

![](https://img.shields.io/badge/-blue?logo=amg)
![](https://img.shields.io/badge/-blue?logo=amg&style=social)
![](https://img.shields.io/badge/-blue?logo=amg&style=plastic)
![](https://img.shields.io/badge/-blue?logo=amg&style=flat-square)
![](https://img.shields.io/badge/-blue?logo=amg&style=for-the-badge)

![](https://img.shields.io/badge/-blue?logo=amg&logoSize=auto)
![](https://img.shields.io/badge/-blue?logo=amg&logoSize=auto&style=social)
![](https://img.shields.io/badge/-blue?logo=amg&logoSize=auto&style=plastic)
![](https://img.shields.io/badge/-blue?logo=amg&logoSize=auto&style=flat-square)
![](https://img.shields.io/badge/-blue?logo=amg&logoSize=auto&style=for-the-badge)

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