Fix typo "requirments" in the PR template (#375)

Signed-off-by: KeisukeYamashita <[email protected]>

Author: KeisukeYamashita

.github/pull_request_template.md

@@ -16,7 +16,7 @@ Link to any related issue(s):
 
 - [ ] I have signed the [MongoDB CLA](https://www.mongodb.com/legal/contributor-agreement)
 - [ ] I have read the Terraform contribution guidelines
-- [ ] I have added tests that prove my fix is effective or that my feature works per HashiCorp requirments
+- [ ] I have added tests that prove my fix is effective or that my feature works per HashiCorp requirements
 - [ ] I have added any necessary documentation (if appropriate)
 - [ ] I have run make fmt and formatted my code