fix(guidelines): fix typo (scaleway#3605)

* fix(guidelines): fix spelling

* fix(guidelines): another typo

* fix(guidelines): mising asterisk

Author: RoRoJ

guidelines.mdx

@@ -380,10 +380,10 @@ Use the [Oxford comma](https://en.wikipedia.org/wiki/Serial_comma) (also known a
 | --------------------- | ------------------|----------------------------------------- |
 | megabyte              | MB                | Memory: 100 MB                           |
 | gigabyte              | MB                | Memory: 1 GB                             |
-| gigiabit              | none              | Connectivity; up to 10 gigabit           |
+| gigabit              | none              | Connectivity; up to 10 gigabit           |
 | gigabits per second   | Gbps              | Bandwidth: 1 Gbps                        |
 | megabits per second   | Mbps              | Bandwidth: 100 Mbps                      |
-| gigabute-seconds      | GB-s              | Storage: 1 GB-s                          |
+| gigabit-seconds       | GB-s              | Storage: 1 GB-s                          |
 
 ## Wording and vocabulary
 
@@ -464,7 +464,7 @@ categories:
 - **tags**: The tags used by internal and external search engines to help users find the page 
 - **dates: posted**: The date the page was originally created, in the format `yyyy-mm-dd`. This displays on the generated page.
 - **dates: validation**: The date the page was last validated, in the format `yyyy-mm-dd`. This displays on the generated page, and is used by the Documentation team when identifying documentation pages that need reviewing. 
-- *categories**: The overall product [category](https://github.com/scaleway/docs-content/blob/main/menu/filters.json) that the documentation fits into, used by the site's internal Algolia search.
+- **categories**: The overall product [category](https://github.com/scaleway/docs-content/blob/main/menu/filters.json) that the documentation fits into, used by the site's internal Algolia search.
 
 <Message type="note">
 The `meta: title` and `content: title` should be the same, other than in exceptional cases. Titles should be in [sentence case](https://en.wikipedia.org/wiki/Letter_case#Sentence_case). Different page types should have different types of titles: