Update fallback version

[logc]

Using metals version 1.3.1, there is a deprecation message that suggests to update from Scala 3.2.0 to 3.3.3 as fallback version.

Since the 3.3.x series is LTS, I thought it would make sense to have that as a default value in the upstream package, instead of just solving it locally for my projects, or picking 3.2.2 as the closest supported version.

The entire message reads: LSP :: You are using fallback Scala version 3.2.0, which is not supported in this version of Metals. Please upgrade to Scala version 3.3.3.

My metals server, installed with Coursier, outputs these supported versions:

$ metals --version
metals 1.3.1

# Note:
#   Supported Scala versions:
#     Scala 3: 3.1.3, 3.2.2, 3.3.1, 3.3.2, 3.3.3
#     Scala 2:
#       2.11.12
#       2.12.19, 2.12.18, 2.12.17, 2.12.16, 2.12.12, 2.12.13, 2.12.14, 2.12.15
#       2.13.14, 2.13.11, 2.13.12, 2.13.13, 2.13.7, 2.13.8, 2.13.9, 2.13.10```