Update .readthedocs.yaml

Author: kostrykin

.readthedocs.yaml

@@ -12,11 +12,6 @@ sphinx:
 conda:
   environment: environment.yml
 
-# Install doc-building dependencies
-python:
-  install:
-    - requirements: docs/requirements.txt
-
 # Specify the build process
 build:
   os: ubuntu-24.04
@@ -27,4 +22,5 @@ build:
       - bash ./linux_build.bash
       - pip install dist/libcarna_python-*.whl
     pre_build:
+      - pip install -r docs/requirements.txt
       - export LIBCARNA_PYTHON_NBSPHINX_EXECUTE=never