Refactor/20-novy-copyright

1. What this MR does / why we need it

• Změna copyrightu v záhlaví na F13 Lab
• Změna copyright regexu pro ověřování copyrightu v souborech

2. Which issue this MR addresses

Field	Value
Gitlab Ticket	tablexia#7
Documentation	wiki

3. Make sure that you've checked the boxes below before you submit MR

• I have read Contribution guidelines
• I have checked Code Quality report and there is no High/Critical error.
• No conflict with main/master branch.
• I have documented all the known issues
  • ... and created backlog items for them

4. CHANGELOG/Release Notes (optional)

• Změněn copyright v AbstractCopyrightTest.java, aby odpovídal F13 Lab
• Změněn regex COPYRIGHT_PATTERN, aby uznával pouze nový copyright F13 Lab

Thanks for your MR, you're awesome! 👍