ci: avoid dependabot scanning raw requirements file

.readthedocs.yaml

@@ -7,7 +7,7 @@ build:
 
 python:
   install:
-    - requirements: ./scripts/requirements-docs.txt
+    - requirements: ./scripts/requirements/requirements-docs.txt
     - path: .
 
 sphinx:

scripts/export_requirements_txt.py

@@ -6,7 +6,7 @@
 from pathlib import Path
 
 Format = enum.Enum("Format", "requirements setuppy")
-BASE_DIR = Path(__file__).parent
+BASE_DIR = Path(__file__).parent / "requirements"
 
 
 def fix_end_of_file(text):
@@ -23,6 +23,8 @@ def pdm_export(args, filename, format: Format):
             ['# This a dummy setup.py to enable GitHub "Used By" stats', output]
         )
     p = Path(filename)
+    if not p.parent.exists():
+        p.parent.mkdir(parents=True)
     is_new = not p.exists()
     if is_new or p.read_text() != output:
         p.write_text(output)