cli-reference.md update for the new --module-prefix

Author: JasonAtClockwork

docs/docs/cli-reference.md

@@ -243,7 +243,7 @@ Run `spacetime rename --help` for more detailed information.
 
 Generate client files for a spacetime module.
 
-**Usage:** `spacetime spacetime generate --lang <LANG> --out-dir <DIR> [--project-path <DIR> | --bin-path <PATH> | --module-name <MODULE_NAME> | --uproject-dir <DIR>]`
+**Usage:** `spacetime spacetime generate --lang <LANG> --out-dir <DIR> [--project-path <DIR> | --bin-path <PATH> | --module-name <MODULE_NAME> | --uproject-dir <DIR> | --module-prefix <PREFIX>]`
 
 Run `spacetime help publish` for more detailed information.
 
@@ -260,6 +260,7 @@ Run `spacetime help publish` for more detailed information.
 
   Default value: `SpacetimeDB.Types`
 * `--module-name <MODULE_NAME>` — The module name that should be used for DLL export macros (required for lang unrealcpp)
+* `--module-prefix <MODULE_PREFIX>` — The module prefix to use for generated types (only used with --lang unrealcpp)
 * `-l`, `--lang <LANG>` — The language to generate
 
   Possible values: `csharp`, `typescript`, `rust`, `unrealcpp`