docs(derive): Update deprecation notice

examples/derive_ref/README.md

@@ -208,7 +208,10 @@ These correspond to a `clap::Arg`.
   - When `Option<T>`, the subcommand becomes optional
 - `from_global`: Read a `clap::Arg::global` argument (raw attribute), regardless of what subcommand you are in
 - `parse(<kind> [= <function>])`: `clap::Arg::validator` and `clap::ArgMatches::values_of_t`
-  - **Deprecated:** except for `from_flag` or `from_occurrences`, instead use `value_parser`
+  - **Deprecated:**
+    - Use `value_parser(...)` for `from_str`, `try_from_str`, `from_os_str`, and `try_from_os_str`
+    - Use `action(ArgAction::Count` for `from_occurrences`
+    - Use `action(ArgAction::SetTrue` for `from_flag`
   - Default: `try_from_str`
   - Warning: for `Path` / `OsString`, be sure to use `try_from_os_str`
   - See [Arg Types](#arg-types) for more details