Add Release Note (feature): Comes with [Bash v5.2.21](https://git.savannah.gnu.org/cgit/bash.git/commit/?id=2bb3cbefdb8fd019765b1a9cc42ecf37ff22fec6).

Add Release Note (feature): Comes with [Bash v5.2.21](https://git.savannah.gnu.org/cgit/bash.git/commit/?id=2bb3cbefdb8fd019765b1a9cc42ecf37ff22fec6). #80