Fix CHANGELOG_PENDING

[t0yv0]

Description

Removed this as nothing changed yet for the users since codegen change needs to be completed:

• [codegen] Deserialization should not rely on classes with constructors having large parameter counts #390: support resources with over 255 parameters

Removed this since this has not been released in here and ties into an existing feature:

• [pulumi-google-native] Fix generated package and class names for versioned APIs #381: all Java packages changed to be more intuitive, unfortunately this is a breaking change

Fixes # (issue)

Checklist

• I have added tests that prove my fix is effective or that my feature works

• I have updated the CHANGELOG-PENDING file with my change

• Yes, there are changes in this PR that warrants bumping the Pulumi Service API version

[t0yv0]

FYI @pawelprazak