build: bump semantic-kernel from 1.39.0 to 1.39.4

Bumps [semantic-kernel](https://github.com/microsoft/semantic-kernel) from 1.39.0 to 1.39.4.
- [Release notes](https://github.com/microsoft/semantic-kernel/releases)
- [Commits](microsoft/semantic-kernel@dotnet-1.39.0...python-1.39.4)

---
updated-dependencies:
- dependency-name: semantic-kernel
  dependency-version: 1.39.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

poetry.lock

@@ -37,7 +37,7 @@ opentelemetry-instrumentation-httpx = "^0.52b0"
 pillow = "11.0.0"
 azure-mgmt-cognitiveservices = "^14.1.0"
 jsonschema = "^4.25.1"
-semantic-kernel = {version = "1.39.0", python = "<3.13"}
+semantic-kernel = {version = "1.39.4", python = "<3.13"}
 pydantic = "2.11.10"
 azure-ai-ml = "^1.31.0"
 azure-cosmos = "^4.14.3"