doc: requirements: Add pyserial
Since 7eaca455faf6ff8d9a92c4392da281dab08d0c2b, pyserial is required for
building docs because `DeviceAdapter` from the `pytest-twister-harness`
plugin, which is imported by autodoc, now depends on it.
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
diff --git a/doc/requirements.txt b/doc/requirements.txt
index bb12e24..55cf8de 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -15,8 +15,9 @@
PyYAML>=6.0
pykwalify
-# Used by pytest-twister-harness plugin
+# Used by pytest-twister-harness plugin (imported by autodoc)
pytest
+pyserial
# Doxygen doxmlparser
doxmlparser