Tests: rename SamplesSpec11RenderingTest as SamplesSpecRenderingTest

The tests under the `spec` directory aren't exclusively for version 1.1 anymore.

The `spec2` directory remains for documents that should typically be rendered with the
transcoding helper.

echosvg-test/src/test/java/io/sf/carte/echosvg/test/svg/SamplesSpec11RenderingTest.java → echosvg-test/src/test/java/io/sf/carte/echosvg/test/svg/SamplesSpecRenderingTest.java

@@ -42,7 +42,7 @@
  * with {@link #testNV(String)}.
  * </p>
  */
-public class SamplesSpec11RenderingTest extends AbstractSamplesRendering {
+public class SamplesSpecRenderingTest extends AbstractSamplesRendering {
 
 	@BeforeAll
 	public static void setUpBeforeClass() throws Exception {