chore: fix PR template

Author: timcreatedit

Diff for: .github/PULL_REQUEST_TEMPLATE.md

@@ -14,5 +14,5 @@
 
 <!--- Put an `x` in all the boxes that apply: -->
 - [ ] My PR title is in the style of [conventional commits](https://www.conventionalcommits.org/)
-- [ ] All public facing APIs are doccumented with [dartdoc](https://dart.dev/guides/language/effective-dart/documentation)
+- [ ] All public facing APIs are documented with [dartdoc](https://dart.dev/guides/language/effective-dart/documentation)
 - [ ] I have added tests to cover my changes