.readthedocs.yaml: Added to comply with new readthedocs requirements.

Signed-off-by: enriquezgarc <enriquezgarcia.external@infineon.com>

docs/conf.py

@@ -126,24 +126,15 @@
 
 # -- Options for HTML output ----------------------------------------------
 
-# on_rtd is whether we are on readthedocs.org
-on_rtd = os.environ.get("READTHEDOCS", None) == "True"
-
-if not on_rtd:  # only import and set the theme if we're building docs locally
-    try:
-        import sphinx_rtd_theme
-
-        html_theme = "sphinx_rtd_theme"
-        html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
-    except:
-        html_theme = "default"
-        html_theme_path = ["."]
-else:
-    # html_theme_path = ["."]
+try:
     import sphinx_rtd_theme
 
     html_theme = "sphinx_rtd_theme"
     html_theme_path = [sphinx_rtd_theme.get_html_theme_path(), "."]
+except:
+    html_theme = "default"
+    html_theme_path = ["."]
+
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the