fix the bad repo suggestion for standalone projects

Signed-off-by: Grant Ramsay <seapagan@gmail.com>

py_maker/pymaker.py

@@ -319,11 +319,16 @@ def get_input(self) -> None:
                 if self.settings.github_username
                 else "<your GitHub username>"
             )
+            repo_name = (
+                sanitize(self.choices.project_dir.name)
+                if self.choices.package_name == "-"
+                else self.choices.package_name
+            )
             self.choices.repository = Prompt.ask(
                 "Repository URL?",
                 default=(
                     f"https://github.com/{github_username}/"
-                    f"{re.sub(r'[_.]+', '-', self.choices.package_name)}"
+                    f"{re.sub(r'[_.]+', '-', repo_name.lower())}"
                 ),
             )