Correct type in command line arg

src/hyperfine/app.rs

@@ -115,7 +115,7 @@ fn build_app() -> App<'static, 'static> {
                 .value_names(&["DELTA"])
                 .requires("parameter-scan")
                 .help(
-                    "This argument requires --parameter-scan to be sepcified as well. \
+                    "This argument requires --parameter-scan to be specified as well. \
                      Traverse the range MIN..MAX in steps of DELTA.",
                 ),
         )