ci: fix version of breathe and sphinx

Do not install latest version of breathe and sphinx, use the versions
supported by Zephyr.

Signed-off-by: Anas Nashif <[email protected]>

Author: nashif

.github/workflows/doc-build.yml

@@ -30,8 +30,8 @@ jobs:
     - name: install-pip
       run: |
         pip3 install setuptools
-        pip3 install 'breathe>=4.9.1' 'docutils>=0.14' \
-                     'sphinx>=1.7.5' sphinx_rtd_theme sphinx-tabs \
+        pip3 install 'breathe>=4.9.1,<4.15.0' 'docutils>=0.14' \
+                     'sphinx>=1.7.5,<3.0' sphinx_rtd_theme sphinx-tabs \
                      sphinxcontrib-svg2pdfconverter 'west>=0.6.2'
         pip3 install pyelftools
 

scripts/requirements.txt

@@ -1,6 +1,6 @@
 wheel==0.30.0
-breathe==4.9.1
-sphinx==1.7.5
+breathe==4.9.1,<4.15.0
+sphinx==1.7.5,<3.0
 docutils==0.14
 sphinx_rtd_theme
 sphinxcontrib-svg2pdfconverter