[Chore] Notes for next release

[jlizen]

Noting some non-obvious changes that we will need for our next release, that deviate from standard release-plz handling:

• Make Telemetry API log record type generic #1098 - this requires a minor version bump of lambda-extension - even though cargo-semver-checks is happy, we have a risk of inference breakage if somebody is directly constructing a variant of the LambdaTelemetryRecord enum that doesn't have the new generic. Since, then it won't infer the default of String. Very unlikely to affect anybody, but worth the minor bump + release note mention
• lambda-events also needs a minor version bump due to a new deprecation (though cargo-semver-checks flags that one)

[jlizen]

cc @darklight3it fyi, i think you are planning to run the next release