doc(readme): add image-acc WG into the list

doc(readme): add image-acc WG into the list

Author: steven-zou

README.md

@@ -18,6 +18,7 @@ Workgroup is a virtual team of aggregating the efforts of all the interested par
 |[Operator](./workgroups/wg-operator/README.md)|Aggregate the efforts from all the interested parties to discuss, design and finally deliver suitable Operator solutions for Harbor|Steven Zou@VMware ([steven-zou](https://github.com/steven-zou))| Ziming Zhang@VMware ([bitsf](https://github.com/bitsf)) | [14 Members](https://github.com/goharbor/community/blob/master/workgroups/wg-operator/README.md#members)|Steven Zou@VMware ([steven-zou](https://github.com/steven-zou))| - |[5 members](https://github.com/goharbor/community/tree/master/workgroups/wg-p2p#members)|
 |[Multi Architecture](https://github.com/goharbor/community/tree/master/workgroups/wg-multiarch)|The purpose of this working group is to enable Harbor to support multiple architectures, such as x86 arm.|ZhiPeng Yu@Alauda ([yuzp1996](https://github.com/yuzp1996))| Steven Zou@VMware ([steven-zou](https://github.com/steven-zou)) |[8 Members](https://github.com/goharbor/community/tree/master/workgroups/wg-multiarch#members)|
 |[Performance](https://github.com/goharbor/community/tree/master/workgroups/wg-performance)|The purpose of this work group is to improve the performance and scalability of harbor in the use case of large data volumes.|ChenYu Zhang@Alauda ([chlins](https://github.com/chlins))| Steven Zou@VMware ([steven-zou](https://github.com/steven-zou))/ Daniel Morinigo@Alauda ([danielfbm](https://github.com/danielfbm)) |[11 Members](https://github.com/goharbor/community/tree/master/workgroups/wg-performance#members)|
+|[Image Acceleration](https://github.com/goharbor/community/tree/master/workgroups/wg-image-accel)|The objective of this working group is to aggregate efforts to discuss, design and finally integrate accelerated container image format support in Harbor.|Bo Liu@AlibabaCloud ([liubogithub](https://github.com/liubogithub))|Steven Zou@VMware ([steven-zou](https://github.com/steven-zou))/Wang Yan@VMWare ([wy65701436](https://github.com/wy65701436))|[7 members](https://github.com/goharbor/community/tree/master/workgroups/wg-image-accel#members)|
 
 ## Structure