test(button): fix typo in ButtonSignalTest name

Author: platosha

…onent/button/tests/ButtonSignalText.java …onent/button/tests/ButtonSignalTest.javavaadin-button-flow-parent/vaadin-button-flow/src/test/java/com/vaadin/flow/component/button/tests/ButtonSignalText.java renamed to vaadin-button-flow-parent/vaadin-button-flow/src/test/java/com/vaadin/flow/component/button/tests/ButtonSignalTest.java vaadin-button-flow-parent/vaadin-button-flow/src/test/java/com/vaadin/flow/component/button/tests/ButtonSignalText.java renamed to vaadin-button-flow-parent/vaadin-button-flow/src/test/java/com/vaadin/flow/component/button/tests/ButtonSignalTest.java

@@ -30,7 +30,7 @@
 import com.vaadin.signals.ValueSignal;
 import com.vaadin.tests.AbstractSignalsUnitTest;
 
-public class ButtonSignalText extends AbstractSignalsUnitTest {
+public class ButtonSignalTest extends AbstractSignalsUnitTest {
 
     private Button button;
     private Icon icon;