fix: broken module matching for server builds

[webbertakken]

Context

Because the server build target platforms for windows and linux were introduced in 2021.2.5 and we didn't account for the first 4 versions of 2021.2, the following versions failed to build:

• 2021.2.1 linux-il2cpp
• 2021.2.1 windows
• 2021.2.2 linux-il2cpp
• 2021.2.2 windows
• 2021.2.3 linux-il2cpp
• 2021.2.3 windows
• 2021.2.4 linux-il2cpp
• 2021.2.4 windows

Changes

• Fix regex to only match versions of Editor that support server build platforms.

Proof

• Regex101: https://regex101.com/r/AQO7ys/2

• Inside base image:

# echo "2021.2.1-macos" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
2021.2.1-macos
# echo "2021.2.1-linux" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
2021.2.1-linux
# echo "2021.2.5-macos" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
2021.2.5-macos
# echo "2021.2.5-linux" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
# echo "2021.2.12-macos" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
2021.2.12-macos
# echo "2021.2.12-linux" | grep -vP '^(2021.2.(?![0-4](?![0-9]))|2021.[3-9]|202[2-9]|20[3-9]).*linux'
#

Checklist

• [x] Read the contribution guide and accept the code of conduct
• [x] Readme (updated or not needed)

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