fix(ci): Fix libgpuspatial version spec for wheels workflow

[paleolimbot]

The wheels workflow was failing:

  cargo 1.95.0 (f2d3ce0bd 2026-03-21)
  Running `maturin pep517 build-wheel -i /tmp/build-env-1p9hnzh9/bin/python --compatibility off --features s2geography,pyo3/extension-module`
      Updating crates.io index
  error: failed to select a version for the requirement `sedona-libgpuspatial = "^0.4.0"`
  candidate versions found which didn't match: 0.4.0-alpha52
  location searched: /project/c/sedona-libgpuspatial
  required by package `sedona-spatial-join-gpu v0.4.0-alpha52 (/project/rust/sedona-spatial-join-gpu)`
  if you are looking for the prerelease package it needs to be specified explicitly
      sedona-libgpuspatial = { version = "0.4.0-alpha52" }
  💥 maturin failed
    Caused by: Cargo metadata failed. Does your crate compile with `cargo build`?
    Caused by: `cargo metadata` exited with an error: 
  Error: command ['maturin', 'pep517', 'build-wheel', '-i', '/tmp/build-env-1p9hnzh9/bin/python', '--compatibility', 'off', '--features', 's2geography,pyo3/extension-module'] returned non-zero exit status 1

This was becase set_dev_version.py has a very specifically defined regex that expected a single space where there were two. I've made it back into a single space but also tried to make the regex a little more lenient.

Briefly, we do this so that we can set a dev version so that when we upload the dev build wheels it looks like a new version.