Fix warning : missing outputs for generic streal reader in connectivity scenario

plugins/processing/signal-processing/box-tutorials/connectivity-magnitude-squared-coherence-eeg.xml

@@ -664,6 +664,14 @@
 					<TypeIdentifier>(0x5ba36127, 0x195feae1)</TypeIdentifier>
 					<Name>Output stream 1</Name>
 				</Output>
+				<Output>
+					<TypeIdentifier>(0x403488e7, 0x565d70b6)</TypeIdentifier>
+					<Name>Output stream 2</Name>
+				</Output>
+				<Output>
+					<TypeIdentifier>(0x6f752dd0, 0x082a321e)</TypeIdentifier>
+					<Name>Output stream 3</Name>
+				</Output>
 			</Outputs>
 			<Settings>
 				<Setting>