[CPP-763] update pycapnp to 1.2.2 (#849)

Author: adrian-kong

pyproject.toml

@@ -5,7 +5,7 @@ readme = "README.md"
 classifiers = []
 requires-python = ">=3.8"
 dynamic = ['version', 'description']
-dependencies = ["PySide6 == 6.3.2", "pycapnp == 1.1.0"]
+dependencies = ["PySide6 == 6.3.2", "pycapnp == 1.2.2"]
 
 [project.optional-dependencies]
 test = [