fix(deps): update dependency pulumi to v3.256.0

Author: renovate[bot]

pyproject.toml

@@ -2,7 +2,7 @@
 authors = [{ name = "Rhys Davies", email = "rhys@memes.nz" }]
 requires-python = "<4.0,>=3.11"
 dependencies = [
-    "pulumi==3.248.0",
+    "pulumi==3.256.0",
     "pulumi-gcp==9.29.0",
     "pulumi-google-native==0.32.0",
     "pulumi-azure-native==3.19.0",