Update Process.md

ViaBedrock Update Process

This file lists the steps necessary to update ViaBedrock.

1. Update data assets (See Data Asset Sources.md) and BedrockMappingData
2. Update ProtocolConstants class
3. Update the EnumGeneratorTask commit hash in build.gradle
4. Update hardcoded blockstates: Search all files for new BlockState("
5. Update data in the protocol/data package
6. Replace Types1_21 and EntityTypes1_20_5 with the new type
7. Replace ClientboundPackets1_21 and ServerboundPackets1_20_5 with the new packet enum
8. Replace ClientboundConfigurationPackets1_21 and ServerboundConfigurationPackets1_20_5 with the new packet enum
9. Update changed packet contents
10. Update rewriters
11. Done!