fix: correct linux directory size calculation by excluding null terminator

Source/DrangPlatform/Source/linux/fs/dir.c

@@ -146,7 +146,7 @@ int drang_fs_get_cwd(char *buffer, size_t size, size_t *out_size)
         }
         free(dir);
         if (out_size) {
-            *out_size = dir_length + 1;
+            *out_size = dir_length;
         }
         DRANG_RETURN();
     }