[Automation] Bump product version numbers

[elastic-observability-automation]

Bump release versions in the config/versions.yml

Update config/versions.yml edot-dotnet 1.2.1

change detected: * key "$.versioning_systems.edot-dotnet.current" updated from "1.2.0" to "1.2.1", in file "config/versions.yml"

1.2.0

## What's Changed

### Enhancements

* Upgrade to .NET 10 SDK by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/339
* Update upstream OTel packages by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/343
* Enhance logging capabilities by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/348

### Fixes

* Fix packaging of PowerShell module by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/297
* Ensure correct execution order for user-provided delegates by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/325

## New Contributors
* @trentm made their first contribution in https://github.com/elastic/elastic-otel-dotnet/pull/313

**Full Changelog**: https://github.com/elastic/elastic-otel-dotnet/compare/1.1.0...1.2.0

1.2.1

## What's Changed

### Fixes

* Ensure environment variable resource attributes apply after EDOT defaults by @stevejgordon in https://github.com/elastic/elastic-otel-dotnet/pull/368

**Full Changelog**: https://github.com/elastic/elastic-otel-dotnet/compare/1.2.0...1.2.1

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[theletterf]

@elastic/docs-engineering Not sure why the CI is failing on this one.