Update project_urls.py

project_urls.py

diff --git a/project_urls.py b/project_urls.py
index 7b5afef..52276ee 100644
--- a/project_urls.py
+++ b/project_urls.py
@@ -7,4 +7,5 @@
             'https://github.com/omerk/tinytapeout-demo1',
             'https://github.com/mattvenn/tinytapeout-7seg-decoder',
             'https://github.com/omerk/tinytapeout-verilog-test',
+            'https://github.com/gregdavill/tinytapeout_spin0',
     ]