Upgrade ronbon to 0.9.1 (#5103)

Author: rzuckerm

poetry.lock

@@ -1,13 +1,13 @@
 [project]
 name = "sample-programs"
-version = "2025.09.27"
+version = "2025.10.13"
 description = "Sample Programs in Every Programming Language"
 readme = ".github/README.md"
 requires-python = ">=3.9,<4.0"
 license = "MIT"
 
 dependencies = [
-    "ronbun (>=0.9.0,<0.10.0)",
+    "ronbun (>=0.9.1,<0.10.0)",
     "glotter2 (>=0.12.1,<0.13.0)"
 ]