docs: fix typos and add missing text (#274)

* fix: typo

* docs: add missing text

Author: vimode

projects/functions/secret-secrets/01-incoming-cipher/README.md

@@ -3,7 +3,7 @@
 Good.
 You've chosen to accept the mission.
 
-Your first task is to implement for us a function we can use to crate text encoders.
+Your first task is to implement for us a function we can use to create text encoders.
 As you may recall from Spy 101 training, we often enlist functions such as [ROT13](https://en.wikipedia.org/wiki/ROT13) to hide text from onlookers.
 
 Your assignment, assuming you opt into it, is to develop a `createCipher` function.

projects/functions/secret-secrets/03-the-golden-code/README.md

@@ -5,7 +5,7 @@ Your advanced cipher held up against attack from the villainous Goldberger and D
 
 We have played defense long enough against these criminals.
 It is time to go on the offense.
-They have their own cipher technology, codenamed the _Golden Code_, which they use to
+They have their own cipher technology, codenamed the _Golden Code_, which they use to create ciphertext.
 
 Your final task, given you agree to tackle it, is to develop a `createCodeCracker` function.
 It should take an object of settings as described below.