OZG-5636 fix test

bayernid-proxy-impl/src/test/java/de/ozgcloud/nachrichten/postfach/bayernid/proxy/UploadStreamObserverTest.java

@@ -253,10 +253,12 @@ class UploadStreamObserverTest {
 
 			private MockedStatic<TempFileUtils> mockTempFileUtils;
 
+			@SneakyThrows
 			@BeforeEach
 			void init() {
 				mockTempFileUtils = mockStatic(TempFileUtils.class);
 				mockTempFileUtils.when(TempFileUtils::createTmpFile).thenReturn(TEMP_FILE_PATH);
+				doReturn(tmpFileInputStream).when(uploadStreamObserver).newInputStream(any());
 			}
 
 			@AfterEach
@@ -311,8 +313,6 @@ class UploadStreamObserverTest {
 			@SneakyThrows
 			@Test
 			void shouldReturnInputStream() {
-				doReturn(tmpFileInputStream).when(uploadStreamObserver).newInputStream(any());
-
 				var result = uploadStreamObserver.createTemporallyFile();
 
 				assertThat(result).isEqualTo(tmpFileInputStream);