fix: Fixed malformed project_urls (hopefully...)

setup.cfg

@@ -9,9 +9,9 @@ long_description = file: README.md
 long_description_content_type = text/markdown; charset=UTF-8; variant=GFM
 url = https://github.com/iwishiwasaneagle/pytest-extra-markers/
 project_urls =
-    Source = "https://github.com/iwishiwasaneagle/pytest-extra-markers/"
-    Changelog = "https://github.com/iwishiwasaneagle/pytest-extra-markers/blob/master/CHANGELOG.md"
-    Issue Tracker = "https://github.com/iwishiwasaneagle/pytest-extra-markers/issues/"
+    Source = https://github.com/iwishiwasaneagle/pytest-extra-markers/
+    Changelog = https://github.com/iwishiwasaneagle/pytest-extra-markers/blob/master/CHANGELOG.md
+    Issue Tracker = https://github.com/iwishiwasaneagle/pytest-extra-markers/issues/
 platforms = Linux
 classifiers =
     License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)