Update keypoints after move of wildcards from ep 4 to 3

See #699 and #812

_episodes/03-create.md

@@ -14,6 +14,8 @@ keypoints:
 - "`mkdir path` creates a new directory."
 - "`mv old new` moves (renames) a file or directory."
 - "`rm path` removes (deletes) a file."
+- "`*` matches zero or more characters in a filename, so `*.txt` matches all files ending in `.txt`."
+- "`?` matches any single character in a filename, so `?.txt` matches `a.txt` but not `any.txt`."
 - "Use of the Control key may be described in many ways, including `Ctrl-X`, `Control-X`, and `^X`."
 - "The shell does not have a trash bin: once something is deleted, it's really gone."
 - "Depending on the type of work you do, you may need a more powerful text editor than Nano."

_episodes/04-pipefilter.md

@@ -16,8 +16,6 @@ keypoints:
 - "`tail` displays the last 10 lines of its input."
 - "`sort` sorts its inputs."
 - "`wc` counts lines, words, and characters in its inputs."
-- "`*` matches zero or more characters in a filename, so `*.txt` matches all files ending in `.txt`."
-- "`?` matches any single character in a filename, so `?.txt` matches `a.txt` but not `any.txt`."
 - "`command > file` redirects a command's output to a file."
 - "`first | second` is a pipeline: the output of the first command is used as the input to the second."
 - "The best way to use the shell is to use pipes to combine simple single-purpose programs (filters)."