Add changelog entry

Author: nojaf

CHANGELOG.md

@@ -20,6 +20,7 @@
 - Remove `external-stdlib` configuration option from `rescript.json`. This option was rarely used and is no longer supported.
 - `js-post-build` now passes the correct output file path based on `in-source` configuration: when `in-source: true`, the path next to the source file is passed; when `in-source: false`, the path in the `lib/<module>/` directory is passed. Additionally, stdout and stderr from the post-build command are now logged. https://github.com/rescript-lang/rescript/pull/8190
 - `js-post-build` command now runs in the directory containing the `rescript.json` where it is defined, instead of the unpredictable build invocation directory. This provides consistent behavior in monorepos. https://github.com/rescript-lang/rescript/pull/8195
+- Remove support for deprecated `bs-dependencies`, `bs-dev-dependencies`, and `bsc-flags` configuration options. Use `dependencies`, `dev-dependencies`, and `compiler-flags` instead. https://github.com/rescript-lang/rescript/pull/8196
 
 #### :eyeglasses: Spec Compliance