doc: enable sphinx-copybutton extension
The sphinx-copybutton extension adds a button to every code snippet
that, when clicked, copies the code to the clipboard.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
diff --git a/scripts/requirements-doc.txt b/scripts/requirements-doc.txt
index 8a518a6..abc92e7 100644
--- a/scripts/requirements-doc.txt
+++ b/scripts/requirements-doc.txt
@@ -7,6 +7,7 @@
sphinxcontrib-svg2pdfconverter
pygments>=2.9
sphinx-notfound-page
+sphinx-copybutton
# YAML validation. Used by zephyr_module.
PyYAML>=5.1
