Fix toml sorting

Author: dstansby

{{cookiecutter.project_slug}}/pyproject.toml

@@ -133,9 +133,9 @@ env_run_base = {commands = [
     "test",
 ]}
 env.docs = {commands = [
-    "mkdocs",
-    "build",
     "--strict",
+    "build",
+    "mkdocs",
 ], extras = [
     "docs",
 ]}