doc: extensions: software_maturity_table: skip missing features

If a feature is not available (e.g. homekit), just log it as a debug
message but do not error, so the build can continue.

Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
(cherry picked from commit 2401e61)
Signed-off-by: Guojun Wang <guojun.wang@nordicsemi.no>

doc/_extensions/software_maturity_table.py

@@ -148,7 +148,7 @@ def run(self):
         default_values = {}
 
         if table_type != "top_level" and table_type not in table_info["features"]:
-            logger.error(f"No information present for requested feature '{table_type}'")
+            logger.debug(f"No information present for requested feature '{table_type}'")
             return []
 
         all_socs = table_info["all_socs"]