doc: add extension for markdown tables

Update Sphinx build to handle markdown tables correctly.

Signed-off-by: Bartosz Gentkowski <[email protected]>

Author: b-gent

doc/mcuboot/conf.py

@@ -34,6 +34,7 @@
     "zephyr.kconfig",
     "sphinx.ext.intersphinx",
     "recommonmark",
+    "sphinx_markdown_tables",
     "zephyr.external_content"
 ]
 source_suffix = [".rst", ".md"]