samples: sockets: exclude nrf5340dk with TF-M from http_server

When the sample is built for this platform a build error is generated
due to ROM being overflowed.

Signed-off-by: Valerio Setti <[email protected]>

Author: valeriosetti

samples/net/sockets/http_server/sample.yaml

@@ -13,5 +13,6 @@ common:
   platform_exclude:
     - native_posix
     - native_posix/native/64
+    - nrf5340dk/nrf5340/cpuapp/ns # Excluding due to ROM overflow.
 tests:
   sample.net.sockets.http.server: {}