[B] Fixes BUKKIT-5673 incorrect java doc for Location#getPitch()

The issue:
The getPitch method was labeled Sets the pitch when it should be gets the pitch so that was changed.

Justification for this PR:
It would be confusing to keep this javadoc the way it is being incorrectly labeled.

PR Breakdown:
Just changed the word 'Sets' to 'Gets' as that reflects what the method does

Testing Results:
No testing needs to occur as I only changed one letter in a javadoc.

JIRA Ticket:
BUKKIT-5673 https://bukkit.atlassian.net/browse/BUKKIT-5673