[Automation] Bump product version numbers

[elastic-observability-automation]

Bump release versions in the config/versions.yml

Update config/versions.yml apm-agent-php 1.16.0

change detected: * key "$.versioning_systems.apm-agent-php.current" updated from "1.15.1" to "1.16.0", in file "config/versions.yml"

v1.16.0

For more information, please see the [changelog](https://www.elastic.co/guide/en/apm/agent/php/current/release-notes.html).

Update config/versions.yml elasticsearch-client-dotnet 9.3.2

change detected: * key "$.versioning_systems.elasticsearch-client-dotnet.current" updated from "9.3.1" to "9.3.2", in file "config/versions.yml"

9.3.1

## What's Changed

* Update `Elastic.Transport` to `0.15.0` by @flobernd in https://github.com/elastic/elasticsearch-net/pull/8830

**Full Changelog**: https://github.com/elastic/elasticsearch-net/compare/9.3.0...9.3.1

9.3.2

## What's Changed

* Fix Query operators to reflect nullable parameters by @amitkanfer in https://github.com/elastic/elasticsearch-net/pull/8836
* Fix `BulkRequest` index inference by @flobernd in https://github.com/elastic/elasticsearch-net/pull/8843
* Regenerate client by @flobernd in https://github.com/elastic/elasticsearch-net/pull/8813
* Update `Elastic.Transport` to `0.15.1` by @flobernd in https://github.com/elastic/elasticsearch-net/pull/8847
  * Fixes an issue with cluster node sniffing

## New Contributors

* @theletterf made their first contribution in https://github.com/elastic/elasticsearch-net/pull/8828
* @amitkanfer made their first contribution in https://github.com/elastic/elasticsearch-net/pull/8836

**Full Changelog**: https://github.com/elastic/elasticsearch-net/compare/9.3.1...9.3.2

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