doc: update known issues for new structure

Changed path for matching warnings.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

.known-issues/doc/networking.conf

diff --git a/.known-issues/doc/networking.conf b/.known-issues/doc/networking.conf
index e49927f..897fc5d 100644
--- a/.known-issues/doc/networking.conf
+++ b/.known-issues/doc/networking.conf
@@ -55,16 +55,16 @@
 #
 # include/net/net_context.h
 #
-^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking[/\\]net_context.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
 ^.*net_context.options
 ^[- \t]*\^
 #
 # include/net/net_stats.h
 #
-^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
+^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking[/\\]net_stats.rst):(?P<lineno>[0-9]+): WARNING: Invalid definition: Expected end of definition. \[error at [0-9]+]
 ^.*net_stats_tc.[a-z]+
 ^[- \t]*\^
 #
 # stray duplicate definition warnings
 #
-^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking.rst):(?P<lineno>[0-9]+): WARNING: Duplicate declaration.
+^(?P<filename>([\-:\\/\w\.])+[/\\]doc[/\\]api[/\\]networking[/\\]net_if.rst):(?P<lineno>[0-9]+): WARNING: Duplicate declaration.