Ignore .ipynb_checkpoints in release checklist script (#543)

Ignore .ipynb_checkpoints

Author: jacobtomlinson

Diff for: scripts/gen_release_checklist_issue.py

@@ -40,6 +40,8 @@
     if file.is_file() and file.suffix in [".ipynb", ".md"]:
         if "_includes" in file.parts:
             continue
+        if ".ipynb_checkpoints" in file.parts:
+            continue
         if "index.md" in file.parts:
             rel_path = file.parent
         else: