fix(curriculum): Improve verbiage and add examples to the map, filter…

…, and reduce challenges (#37709)

* fix: improve verbiage and add examples to challenges

* fix: condensed map method wording

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: remove leading space

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: improved verbiage

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: shortened reduce challenge verbiage

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: shorten verbiage related to reduce 2nd parameter

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: added comma

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: shortened filter verbiage

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix; added comma

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: improved verbiage of map method

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: shortened reduce verbiage

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: correct map method verbiage

Co-Authored-By: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* fix: added word array

Co-Authored-By: Manish Giri <manish.giri.me@gmail.com>

* fix: added missing comma

Co-Authored-By: Manish Giri <manish.giri.me@gmail.com>

* fix: changed u to sumOfAges

Co-Authored-By: Manish Giri <manish.giri.me@gmail.com>

* fix: created one sentence out of many

Co-Authored-By: Parth Parth <34807532+thecodingaviator@users.noreply.github.com>

* fix: changed to on each iteration

Co-Authored-By: Manish Giri <manish.giri.me@gmail.com>

* fix: fixed verbiage in filter and map challenges