BlockProt 1.2.3

• Add support for 1.21.4 & 1.21.3 (@spnda)
• Add: Czech translation (#312) (@Rychleji)
• Change: Add more/newer blocks to config by default (@Rychleji)
• Fix wither explosions breaking protected blocks (#321) (@T14D3)
• Fix: Don't wrongly warn about config duplicates (@spnda)