bump process from 5.0.3 to 5.0.4 in /cipd_packages/codesign (#4727)

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Author: dependabot[bot]

cipd_packages/codesign/pubspec.yaml

@@ -16,7 +16,7 @@ dependencies:
   logging: 1.3.0
   meta: 1.17.0
   platform: 3.1.6
-  process: 5.0.3
+  process: 5.0.4
   retry: 3.1.2
 
 dev_dependencies: