Bump Npgsql.Json.NET from 6.0.3 to 6.0.4

Created by: dependabot[bot]

Bumps Npgsql.Json.NET from 6.0.3 to 6.0.4.

Release notes

Sourced from Npgsql.Json.NET's releases.

v6.0.4

6.0.4 contains is the first patch release in a while, and so contains 22 bug fixes. Everyone is strongly encouraged to upgrade.

The full list of changes is available here.

Commits

• a74a4de Fix double connector return while loading database info (#4426)
• 401f034 Fix NRE while attempting to write a nullable via COPY (#4418)
• 12f1677 Fix auto-preparation with SchemaOnly (#4420)
• 65a7ec7 Break connection if Wait gets timeout with SSL and netstandard2.0 (#4415)
• f99221c Normalize character(1) PG type name to character (#4413)
• c412b06 Add DeadlockDetected to the list of transient errors (#4411)
• 4d88e96 Backport various type handling fixes (#4397)
• 5cbad44 Always read the whole result set for ExecuteScalar (#4379)
• 8b974f7 Fixed reusing SslStream after IOException (#4401)
• df890b0 Pass encoding for column GetTextReader (#4398)
• Additional commits viewable in compare view

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