Update slack link

Signed-off-by: Mohab Mohie <Mohab.MohieElDeen@outlook.com>

README.md

@@ -166,7 +166,7 @@ public void afterClass(){
 <a id="support-and-contributions"></a>
 ## 🤝 Support & Contributions
 - Join us via Slack & Facebook
-<br/><a href="https://join.slack.com/t/automatest-workspace/shared_invite/zt-oii5i2gg-0ZGnih_Y34NjK7QqDn01Dw" target="_blank"><img src="https://a.slack-edge.com/80588/marketing/img/icons/icon_slack_hash_colored.png" alt="automatest-workspace" height="50"/></a>  <a href="https://www.facebook.com/groups/Automatest" target="_blank"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLMDbbgNWvnrNY3pjRSfgqZCPIbGMnVRm1jaaoGhgT2Buv-ipatDIe9zjRJIM1b8eZTZm7csh-R1vfHWwwW9nSlEC4agzoLrGqRsRWogha5oZIYS4LXXLSrAg7ekta6niiXxt5XHe_oLU/s200/f_logo_RGB-Blue_1024.png" alt="Automatest" height="50"/></a>
+<br/><a href="https://join.slack.com/t/shaft-engine/shared_invite/zt-oii5i2gg-0ZGnih_Y34NjK7QqDn01Dw" target="_blank"><img src="https://a.slack-edge.com/80588/marketing/img/icons/icon_slack_hash_colored.png" alt="automatest-workspace" height="50"/></a>  <a href="https://www.facebook.com/groups/Automatest" target="_blank"><img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLMDbbgNWvnrNY3pjRSfgqZCPIbGMnVRm1jaaoGhgT2Buv-ipatDIe9zjRJIM1b8eZTZm7csh-R1vfHWwwW9nSlEC4agzoLrGqRsRWogha5oZIYS4LXXLSrAg7ekta6niiXxt5XHe_oLU/s200/f_logo_RGB-Blue_1024.png" alt="Automatest" height="50"/></a>
 - And feel free to create PRs directly. [This lovely tutorial](https://dev.to/genicsblog/how-to-create-a-pull-request-in-github-correctly-20np) will help.