chore: fix readme

README.md

···
+# Ctypes Hello World
+
+This is an example of how to make your own Python extensions with C.
+
+
+To build the package.
+```shell
+cd libhello
+uv run python setup.py build
+uv run python setup.py install
+```
+
+To run the example code.
+
+```shell
+uv run python main.py
+```

main.py

···
 import libhello
 
-libhello.hello()
+hello = libhello.hello()
+print(hello)

uv.lock

···
 requires-python = ">=3.14"
 
 [[package]]
-name = "c-to-python"
+name = "ctypes-hello-world"
 version = "0.1.0"
 source = { virtual = "." }
 dependencies = [