chore(pr-template): fix typos

[FineFindus]

Description

Fixes various typos and improves the wording in the pr-template.

Fixes #(issue)

Type of change

• Bugfix (Change which fixes a issue)
• New feature (Change which adds new functionality)
• Enhancement (Change which slightly improves existing code)
• Breaking change (This change will introduce incompatibility with existing functionality)

Changelog

• Fixed typos in the pr template

Testing

• I have tested my changes and verified that they work as expected

[daudix]

Thanks!