Add available JRE list in release notes

[ghusta]

Provide a list of available JRE in docker images list in release notes.

For example :

• ghusta/fakesmtp:2.3.0-jre17
• ghusta/fakesmtp:2.3.0-jre11
• etc.

[ghusta]

In GitHub Actions, use for loop in shell, like :

for s in ''jre21 jre17 jre11''; do 
  echo  "- $s"
done

---

Or:

jreList=("jre17" "jre11")
for s in ${jreList[@]}; do 
  echo  "- $s"
done

[ghusta]

See also : https://www.freecodecamp.org/news/bash-array-how-to-declare-an-array-of-strings-in-a-bash-script/