Fix the action fail

Author: ArtyomVancyan

setup.py

@@ -1,10 +1,11 @@
+from os.path import dirname, join
 from urllib.request import urlretrieve
 
 from setuptools import setup
 
 if __name__ == "__main__":
     urlretrieve(
         "https://cdnjs.cloudflare.com/ajax/libs/mermaid/9.4.3/mermaid.js",
-        "src/django_mermaid/static/mermaid.js",
+        join(dirname(__file__), "src", "django_mermaid", "static", "mermaid.js")
     )
     setup()