Update core/os/os_freebsd.odin

Co-authored-by: Laytan <laytanlaats@hotmail.com>

core/os/os_freebsd.odin

@@ -841,6 +841,7 @@ get_env :: proc(key: string, allocator := context.allocator) -> (value: string)
 
 @(require_results)
 get_current_directory :: proc(allocator := context.allocator) -> string {
+	context.allocator = allocator
 	// NOTE(tetra): I would use PATH_MAX here, but I was not able to find
 	// an authoritative value for it across all systems.
 	// The largest value I could find was 4096, so might as well use the page size.