[BUG] Minor - Typos and confusing wording in Eastic.Serilog.Sinks docs

**ECS integration/library project(s) (e.g. Elastic.CommonSchema.Serilog)**:
Elastic.Serilog.Sinks

**ECS schema version (e.g. 1.4.0)**:

**ECS .NET assembly version (e.g. 1.4.2)**:

**Elasticsearch version (if applicable)**:

**.NET framework / OS**:

**Description of the problem, including expected versus actual behavior**:

Simple typos and confusing wording in the Elastic.Serilog.Sinks docs.
https://github.com/elastic/ecs-dotnet/blob/main/src/Elastic.Serilog.Sinks/README.md#:~:text=Option,Description

- First sentence for `Transport` row includes a typo and is unclear in wording and intent.
- First sentence for `BootstrapMethod` row contains a simple typo being "Wheter".

Incredibly minor issue, just pointing it out! Thanks!


**Steps to reproduce**:
Not Applicable