fixes GitHub Issue 378 (wrong link for apache license)

Readme.html

@@ -292,6 +292,9 @@ see javassist.Dump.
 <h2>Changes</h2>
 
 <p>-version 3.29
+<ul>
+  <li>GitHub Issue #378.
+</li>
 
 <p>-version 3.28 on May 8, 2021
 <ul>

pom.xml

@@ -40,7 +40,7 @@
       -->
     <license>
       <name>Apache License 2.0</name>
-      <url>http://www.apache.org/licenses/</url>
+      <url>https://www.apache.org/licenses/LICENSE-2.0</url>
     </license>
   </licenses>