Fix typo and an incorrect comma in XE Shredder Shotgun

[Maarifrah]

Summary

None

Purpose of change

Fixes a typo and an unnecessary comma in the item description of Xedra Evolved's Shredder Shotgun. Commas are used before conjunctions only when connecting two independent clauses, not with an independent clause followed by a dependent clause as is the case in this item description.
Edit: This comma is still incorrect, but I was wrong about why it's incorrect. This sentence forms a compound predicate, and commas are not used before conjunctions in this case. Reference: https://quillbot.com/blog/sentence-and-word-structure/compound-predicate/

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