Add minimun java version in changes.xml

- 1.16.0 -> "Requires a minimum of Java 1.8".
- 1.12 -> "Requires a minimum of Java 1.7".

src/changes/changes.xml

@@ -48,7 +48,7 @@ The <action> type attribute can be add,update,fix,remove.
       <!-- FIX -->
       <!-- UPDATE -->    
     </release>
-    <release version="1.16.0" date="2023-06-17" description="Feature and fix release.">
+    <release version="1.16.0" date="2023-06-17" description="Feature and fix release. Requires a minimum of Java 1.8.">
       <!-- FIX -->
       <action issue="CODEC-295" dev="ggregory" type="fix" due-to="Arturo Bernal">Minor improvements #67.</action> 
       <action                   dev="aherbert" type="fix" due-to="James Gan">Remove duplicated words from Javadocs.</action>
@@ -123,7 +123,7 @@ The <action> type attribute can be add,update,fix,remove.
       <action issue="CODEC-236" dev="ggregory" due-to=" Tomas Shestakov, Gary Gregory" type="update">Broken direct java.nio.ByteBuffer support in org.apache.commons.codec.binary.Hex.</action>
     </release>
 
-    <release version="1.12" date="2019-02-04" description="Feature and fix release.">
+    <release version="1.12" date="2019-02-04" description="Feature and fix release. Requires a minimum of Java 1.7.">
       <!-- The first attribute below should be the issue id; makes it easier to navigate in the IDE outline -->
       <action issue="CODEC-252" dev="chtompki" type="fix">B64 salt generator: Random -> ThreadLocalRandom</action>
       <action issue="CODEC-250" dev="sebb" type="fix" due-to="Alex Volodko">Wrong value calculated by Cologne Phonetic if a special character is placed between equal letters</action>