add getting addition data from the github api

0-Plugin/src/test/java/tag/matcherImplementations/GitHubTagMatcherTest.java

@@ -0,0 +1,20 @@
+package tag.matcherImplementations;
+
+import link.LinkUrl;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class GitHubTagMatcherTest {
+
+	@Test
+	void gettingDescriptionWorks() {
+
+		var sut = new GitHubTagMatcher();
+
+		var tag = sut.ifMatches(new LinkUrl("https://github.com/filefighter/Webapp")).getTag().orElseThrow();
+
+		assertEquals("Frontend Service for FileFighter", tag.getAdditionalData().orElseThrow());
+
+	}
+}