selftests: net: fix grammar in reuseaddr_ports_exhausted.c log message

This patch fixes a grammatical error in a test log message
in reuseaddr_ports_exhausted.c for better clarity.

Signed-off-by: Pranav Tyagi <[e-mail]>
Reviewed-by: Simon Horman <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

tools/testing/selftests/net/reuseaddr_ports_exhausted.c

···
 		ASSERT_NE(-1, fd[0]) TH_LOG("failed to bind.");
 
 		if (opts->reuseport[0] && opts->reuseport[1]) {
-			EXPECT_EQ(-1, fd[1]) TH_LOG("should fail to bind because both sockets succeed to be listened.");
+			EXPECT_EQ(-1, fd[1]) TH_LOG("should fail to bind because both sockets successfully listened.");
 		} else {
 			EXPECT_NE(-1, fd[1]) TH_LOG("should succeed to bind to connect to different destinations.");
 		}