tests: lib: cmsis_nn: add missing filter dimension

Specify the missing filter dimension that was the reason for the v6.0.0
version bump.

Signed-off-by: Jordan Yates <[email protected]>

Author: JordanYates

tests/lib/cmsis_nn/src/main.c

@@ -170,6 +170,7 @@ ZTEST(cmsis_nn, test_convolve)
 	input_dims.c = CONV_4_IN_CH;
 	filter_dims.w = CONV_4_FILTER_X;
 	filter_dims.h = CONV_4_FILTER_Y;
+	filter_dims.c = CONV_4_IN_CH;
 	output_dims.w = CONV_4_OUTPUT_W;
 	output_dims.h = CONV_4_OUTPUT_H;
 	output_dims.c = CONV_4_OUT_CH;