docs: Update generated CLI docs

docs/content/cli.md

@@ -619,7 +619,7 @@ opa exec <path> [<path> [...]] [flags]
       --log-timestamp-format string          set log timestamp format (OPA_LOG_TIMESTAMP_FORMAT environment variable)
       --set stringArray                      override config values on the command line (use commas to specify multiple values)
       --set-file stringArray                 override config values with files on the command line (use commas to specify multiple values)
-  -I, --stdin-input                          read input document from `os.Stdin` rather than a static file
+  -I, --stdin-input                          read input document from stdin rather than a static file
       --timeout duration                     set exec timeout with a Go-style duration, such as '5m 30s'. (default unlimited)
       --v1-compatible                        opt-in to OPA features and behaviors that will be enabled by default in a future OPA v1.0 release
 ```