chore(release): bump workspace version to 0.4.1

Ships the standalone quarto-hub-mcp release bundle (bd-sca6g1tu),
validated via the v0.4.1-rc.1 dry-run.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: cscheid

Cargo.lock

@@ -23,7 +23,7 @@ exclude = [
 resolver = "2"
 
 [workspace.package]
-version = "0.4.1-rc.1"
+version = "0.4.1"
 authors = ["Posit Software, PBC"]
 homepage = "https://github.com/posit-dev/quarto-markdown-syntax"
 keywords = ["parser"]