!5 fix build error

From: @lyn1001 
Reviewed-by: @shinwell_hu 
Signed-off-by: @shinwell_hu

rubygem-open4.spec

@@ -2,11 +2,11 @@
 Summary:             Manage child processes and their IO handles easily
 Name:                rubygem-open4
 Version:             1.3.4
-Release:             1
+Release:             2
 License:             BSD or Ruby
 URL:                 http://github.com/ahoward/open4/
 Source0:             https://rubygems.org/gems/open4-%{version}.gem
-BuildRequires:       rubygems-devel rubygem(minitest)
+BuildRequires:       rubygems-devel rubygem(minitest) rubygem(did_you_mean)
 BuildArch:           noarch
 %description
 Open child process with handles on pid, stdin, stdout, and stderr.
@@ -53,5 +53,8 @@ popd
 %doc %{gem_docdir}
 
 %changelog
+* Thu Mar 3 2022 liyanan <liyanan32@huawei.com> - 1.3.4-2
+- Add buildrequires rubygem(did_you_mean)
+
 * Mon Jul 27 2020 yaokai <yaokai13@huawei.com> - 1.3.4-1
 - package init