Fix Typo in CONTRIBUTING.md

Changed 'LICENCE' to 'LICENSE'

CONTRIBUTING.md

@@ -3,7 +3,7 @@ Please ensure your pull request adheres to the following guidelines:
 
 * Please search previous suggestions before making a new one, as yours may be a duplicate.
 * Please make an individual pull request for each suggestion.
-* Use the following format: \[RESOURCE\]\(REPO-LINK\) - DESCRIPTION. [LICENCE] \[website\]\(WEB-LINK\)
+* Use the following format: \[RESOURCE\]\(REPO-LINK\) - DESCRIPTION. [LICENSE] \[website\]\(WEB-LINK\)
 * Keep descriptions short and simple.
 * End all descriptions with a full stop/period.
 * Make sure your text editor is set to remove trailing whitespace.