small fix

5-ShellP3/shell_roadmap.md

-## Proposed Shell Roadmap
-
-Week 5:  Shell CLI Parser Due
-
-Week 6:  Execute Basic Commands
-
-Week 7:  Add support for pipes (extra-credit for file redirection)
-
-Week 8:  Basic socket assignment
-
-Week 9:  Remote Shell Extension
-
-Week 11: Add support for something like `nsenter` to enter a namespace
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