Add missing license

src/test/java/org/sonarlint/intellij/documentation/SonarLintDocumentationTests.kt

@@ -1,3 +1,22 @@
+/*
+ * SonarLint for IntelliJ IDEA
+ * Copyright (C) 2015-2024 SonarSource
+ * [email protected]
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02
+ */
 package org.sonarlint.intellij.documentation
 
 import java.net.HttpURLConnection