Update CHANGELOG.md
Update CHANGELOG.md

v0.13.0 -- Added PR #6277. 
- [#6277](https://github.com/influxdata/influxdb/pull/6277): Fix deadlock in tsm1/file_store
influxdb/influxdb,vladlopes/influxdb,nooproblem/influxdb,archsaber/influxdb,mark-rushakoff/influxdb,influxdata/influxdb,otoolep/influxdb,benbjohnson/influxdb,vladlopes/influxdb,jgeiger/influxdb,runner-mei/influxdb,jgeiger/influxdb,otoolep/influxdb,nooproblem/influxdb,pkittenis/influxdb,otoolep/influxdb,linearb/influxdb,vladlopes/influxdb,jgeiger/influxdb,li-ang/influxdb,pkittenis/influxdb,nooproblem/influxdb,chenziliang/influxdb,influxdata/influxdb,archsaber/influxdb,otoolep/influxdb,influxdb/influxdb,influxdb/influxdb,nooproblem/influxdb,chenziliang/influxdb,linearb/influxdb,li-ang/influxdb,jgeiger/influxdb,pkittenis/influxdb,chenziliang/influxdb,mark-rushakoff/influxdb,otoolep/influxdb,archsaber/influxdb,influxdb/influxdb,influxdb/influxdb,pkittenis/influxdb,jgeiger/influxdb,pkittenis/influxdb,archsaber/influxdb,vladlopes/influxdb,runner-mei/influxdb,nooproblem/influxdb,mark-rushakoff/influxdb,runner-mei/influxdb,jgeiger/influxdb,benbjohnson/influxdb,runner-mei/influxdb,linearb/influxdb,mark-rushakoff/influxdb,benbjohnson/influxdb,mark-rushakoff/influxdb,linearb/influxdb,benbjohnson/influxdb,mark-rushakoff/influxdb,linearb/influxdb,chenziliang/influxdb,otoolep/influxdb,influxdb/influxdb,pkittenis/influxdb