[NFC][clang-tidy][docs] Remove mention of backported fix of...

[NFC][clang-tidy][docs] Remove mention of backported fix of `readability-suspicious-call-argument` from `ReleaseNotes`

Commit 416e689e introduced a fix to
`readability-suspicious-call-argument` which added an entry to the
Release Notes, but the same change was backported to **14.0** in commit
e89602b7b2ec12f20f2618cefb864c2b22d0048a.

Hence, this change is not a new thing of the to-be 15.0 release.