!167 update sig-fs to sig-kernel

* Description:[fix] update sig-fs to sig-kernel

sig/README.md

@@ -66,4 +66,4 @@ SIG信息记录统一归档在OpenHamony/community仓库的sig目录内：
 |5|[sig-openblock](https://gitee.com/openharmony/community/blob/master/sig/sig-openblock/sig_openblock.md)|In order to extend OpenHarmony OS's use in youth programming and STEM education, OpenBlock SIG will port the runtime of the Blockly based graphical programming language to OpenHarmony OS. And support soft bus, distributed and other OpenHarmony OS capabilities.|[@dutianwei](https://gitee.com/duzc2)|
 |6|[sig-riscv](https://gitee.com/openharmony/community/blob/master/sig/sig-riscv/sig-riscv.md)|RISC-V SIG aims to build a RISC-V ecosystem for OpenHarmony, provide instructions to build software, maintain supports for RISC-V devices, and enable security capabilities like TEE on RISC-V. RISC-V SIG will promote more developers to involve in developing OpenHarmony on RISC-V.|[@yujiageng](https://gitee.com/yu_jia_geng)|
 |7|[sig-toolchains](https://gitee.com/openharmony/community/blob/master/sig/sig-toolchains/sig_toolchains.md)|Tools & Toolchains development and planning|[@berolinux](https://gitee.com/berolinux)|
-|8|[sig-fs](https://gitee.com/openharmony/community/blob/master/sig/sig-fs/sig_fs.md)|Maintenance of file system releated open source software to support the commercial use|[@wangmihu](https://gitee.com/wangmihu2008)|
+|8|[sig-kernel](https://gitee.com/openharmony/community/blob/master/sig/sig-kernel/sig_kernel.md)|Maintenance of file system releated open source software to support the commercial use|[@wangmihu](https://gitee.com/wangmihu2008)|

sig/sig-fs/sig_fs.md → sig/sig-kernel/sig_kernel.md

 # SIG Template
- English | [简体中文](./sig_fs_cn.md)
+ English | [简体中文](./sig_kernel_cn.md)
  
  Note: The content of this SIG follows the convention described in OpenHarmony's PMC Management Charter [README](/zh/pmc.md).
 

sig/sig-fs/sig_fs_cn.md → sig/sig-kernel/sig_kernel_cn.md

  # SIG组
- 简体中文 | [English](./sig_fs.md)
+ 简体中文 | [English](./sig_kernel.md)
 
 说明：本SIG的内容遵循OpenHarmony的PMC管理章程 [README](/zh/pmc.md)中描述的约定。