message: Updated releasing/README.md for CentOS
diff: @@ -12,9 +12,10 @@ RedHat Enterprise Linux support).
  Currently supported Linux distributions are:
  - CentOS 7
  -- CentOS 8
  - Ubuntu Xenial (16.04 LTS)
  - Ubuntu Bionic (18.04 LTS)
  - Ubuntu Eoan (19.10)
  - Ubuntu Focal (20.04 LTS)
  - Ubuntu Groovy (20.10)
  +
  +Note that CentOS 8 was EOL on December 2021 but CentOS 7 is still supported until 2024.
  