Try locking issues after 300 days instead of 365

This will hopefully help reduce the the number of commends left on old closed tickets. (It becomes difficult to keep track of these comments since the ticket has been closed and many times the commends are not relevant in relation to the original issue. It is probably better for new issues to have their own tickets.)

.github/lock.yml

@@ -1,7 +1,7 @@
 # Configuration for Lock Threads - https://github.com/dessant/lock-threads
 
 # Number of days of inactivity before a closed issue or pull request is locked
-daysUntilLock: 365
+daysUntilLock: 300
 
 # Skip issues and pull requests created before a given timestamp. Timestamp must
 # follow ISO 8601 (`YYYY-MM-DD`). Set to `false` to disable