🪲 [Fix]: Update test to adjust output rendering (#10)

## Description

This pull request includes a small change to the
`tests/Markdown.Tests.ps1` file. The change configures the PowerShell
output rendering style before and after running tests to ensure
consistent output formatting. This to ensure that comparison can be done
without counting in rendering.

* Added `BeforeAll` block to set `$PSStyle.OutputRendering` to 'Host'
before tests run.
* Added `AfterAll` block to reset `$PSStyle.OutputRendering` to 'Ansi'
after tests complete.

## Type of change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [ ] 📖 [Docs]
- [x] 🪲 [Fix]
- [ ] 🩹 [Patch]
- [ ] ⚠️ [Security fix]
- [ ] 🚀 [Feature]
- [ ] 🌟 [Breaking change]

## Checklist

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [x] I have performed a self-review of my own code
- [x] I have commented my code, particularly in hard-to-understand areas

Author: MariusStorhaug

tests/Markdown.Tests.ps1

@@ -9,6 +9,10 @@
 [CmdletBinding()]
 param()
 
+BeforeAll {
+    $PSStyle.OutputRendering = 'Host'
+}
+
 Describe 'Module' {
     Context 'Set-MarkdownSection' {
         It 'Can render a #2 heading with a paragraph' {
@@ -245,3 +249,7 @@ This is the end of the document
         }
     }
 }
+
+AfterAll {
+    $PSStyle.OutputRendering = 'Ansi'
+}