[pip] Update labnode-async requirement from ~=0.16.3 to ~=0.16.4 (#63)

Updates the requirements on [labnode-async](https://github.com/PatrickBaus/labnode_async) to permit the latest version.
- [Release notes](https://github.com/PatrickBaus/labnode_async/releases)
- [Commits](PatrickBaus/labnode_async@0.16.3...0.16.4)

---
updated-dependencies:
- dependency-name: labnode-async
  dependency-type: direct:production
...

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requirements.txt

@@ -4,7 +4,7 @@ async-gpib~=2.1.2
 beanie~=1.26.0
 gpib-ctypes>=0.3.0
 hp3478a-async~=1.4.1
-labnode-async~=0.16.3
+labnode-async~=0.16.4
 prologix-gpib-async~=1.4.14
 pydantic~=2.7.4
 python-decouple~=3.8