add v1.60.2 release note

Author: c9s

doc/release/v1.60.2.md

@@ -0,0 +1,18 @@
+[Full Changelog](https://github.com/c9s/bbgo/compare/v1.60.1...main)
+
+ - [#1739](https://github.com/c9s/bbgo/pull/1739): FEATURE: [dca2] set exchange fee rate for round position
+ - [#1738](https://github.com/c9s/bbgo/pull/1738): FEATURE: [okx] update symbols to latest
+ - [#1737](https://github.com/c9s/bbgo/pull/1737): FEATURE: [xmaker] implement tryArbitrage
+ - [#1730](https://github.com/c9s/bbgo/pull/1730): FEATURE: [xmaker] add market trade signal
+ - [#1734](https://github.com/c9s/bbgo/pull/1734): REFACTOR: [xmaker] refactor for supporting ioc arb [part1]
+ - [#1736](https://github.com/c9s/bbgo/pull/1736): MINOR: [session] remove environment nil validation log
+ - [#1742](https://github.com/c9s/bbgo/pull/1742): FIX: types/stream: change errorf to warnf
+ - [#1741](https://github.com/c9s/bbgo/pull/1741): FIX: upgrade github.com/c9s/requestgen to 1.4.3
+ - [#1740](https://github.com/c9s/bbgo/pull/1740): FIX: upgrade requestgen and re-generate max cancel order request files
+ - [#1726](https://github.com/c9s/bbgo/pull/1726): dep: bump morphy2k/revive-action from 2.5.9 to 2.5.10
+ - [#1735](https://github.com/c9s/bbgo/pull/1735): FIX: configure environment
+ - [#1724](https://github.com/c9s/bbgo/pull/1724): FIX: fix slice init length
+ - [#1733](https://github.com/c9s/bbgo/pull/1733): FIX: [bbgo] fix the defaults / initialize steps
+ - [#1732](https://github.com/c9s/bbgo/pull/1732): FIX: fix env name
+ - [#1728](https://github.com/c9s/bbgo/pull/1728): FIX: [core] fix memory leak
+ - [#1731](https://github.com/c9s/bbgo/pull/1731): FIX: fix json tag