[dotnet] Version bump for development toward 4.0 RC2
# BUILD FILE SYNTAX: STARLARK
-SE_VERSION = "4.0.0-rc1"
+SE_VERSION = "4.0.0-rc2"
ASSEMBLY_VERSION = "4.0.0.0"
SUPPORTED_NET_FRAMEWORKS = ["net45", "net46", "net47", "net48"]
SUPPORTED_NET_STANDARD_VERSIONS = ["netstandard2.0", "netstandard2.1", "net5.0"]
