docs: fix typo in readme introduction

[ts-practicon]

🙋 Documentation Request

There is a very small typo in the first sentence of the 'Introduction' section of the readme:

'The Microsoft.FluentUI.AspNetCore.Components package provides a set of Blazor components which are used to build applications that have a Fluent design (i.e. have the look and feel or modern Microsoft applications).'

💁 Possible Solution

Change "or" to "of".