Fix typo in PULL_REQUEST_TEMPLATE.md

Summary:
Found a typo.

N/A

 [INTERNAL] [MINOR] [GitHub] -Fix typo in PULL_REQUEST_TEMPLATE.md
Closes facebook#16723

Differential Revision: D6260883

Pulled By: hramos

fbshipit-source-id: 7feb8ba60f5c63849ef89ef8385c7ddf52ed65e3

Author: timwangdev

.github/PULL_REQUEST_TEMPLATE.md

@@ -27,7 +27,7 @@ Help reviewers and the release process by writing your own release notes
 [----------]        TYPE
 [ CLI      ]   [-------------]      LOCATION
 [ DOCS     ]   [ BREAKING    ]   [-------------]
-[ GENERAl  ]   [ BUGFIX      ]   [-{Component}-]
+[ GENERAL  ]   [ BUGFIX      ]   [-{Component}-]
 [ INTERNAL ]   [ ENHANCEMENT ]   [ {File}      ]
 [ IOS      ]   [ FEATURE     ]   [ {Directory} ]   |-----------|
 [ ANDROID  ]   [ MINOR       ]   [ {Framework} ] - | {Message} |