fix: update docs conf.py for Read the Docs deprecation of Sphinx cont…

…ext injection at build time

docs/source/conf.py

@@ -84,3 +84,14 @@
 
 # -- Options for EPUB output
 epub_show_urls = 'footnote'
+
+# Read the Docs deprecated of Sphinx context injection at build time
+# so we set html_baseurl and html_context for compatibility:
+
+# Set canonical URL from the Read the Docs Domain
+html_baseurl = os.environ.get("READTHEDOCS_CANONICAL_URL", "")
+
+html_context = {}
+# Tell Jinja2 templates the build is running on Read the Docs
+if os.environ.get("READTHEDOCS", "") == "True":
+    html_context["READTHEDOCS"] = True