ADS release v2.8.8

[liudmylaru]

Description

Running release v2.8.8
Jira: https://jira.oci.oraclecorp.com/browse/ODSC-44376

• added release notes
• updated ADS version
• updated trigger for readthedocs documentation build

Pre-commit check

check python ast.....................................(no files to check)Skipped check docstring is first.............................(no files to check)Skipped check json...............................................................Passed check for merge conflicts................................................Passed check yaml...............................................................Passed detect private key.......................................................Passed fix end of files.........................................................Passed pretty format json.......................................................Passed trim trailing whitespace.................................................Passed black................................................(no files to check)Skipped rst ``code`` is two backticks............................................Passed rst ``inline code`` next to normal text..................................Passed Detect hardcoded secrets.................................................Passed check-copyright......................................(no files to check)Skipped