Fix spelling and terminology consistency

[donatik27]

1. In CODE_OF_CONDUCT.md: Changed "behaviour" to "behavior" Changed "algorithmical" to "algorithmic"

2. In CONTRIBUTING.md: Changed "decription" to "description" in branch naming example

Types of changes What types of changes does your code introduce? [x] Documentation update Testing Requires testing [x] No Documentation Requires documentation update [x] No Requires explanation in Release Notes [x] No Remarks These documentation changes improve accuracy and consistency by:

1. Standardizing American English spelling ("behavior")
2. Correcting technical terminology ("algorithmic")
3. Fixing a typo in branch naming example ("description") These changes maintain documentation quality without affecting functionality.

[rubo]

The changes don't adhere to our contribution guide. Thank you for your time and attention.