mcap-protobuf-support: bump patch version to release #1148 (#1150)

### Changelog

#### Changed
- updated the minimum required version of the `protobuf` library for
`mcap-protobuf-support` to >=4.25 . This removes a deprecation warning
that is printed whenever the library is used for reading.

### Description

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python/mcap-protobuf-support/mcap_protobuf/__init__.py

@@ -1 +1 @@
-__version__ = "0.4.1"
+__version__ = "0.5.0"