Remove emoji from headers

Github automatically converts headers in Markdown to HTML links.

Unfortunately this includes any emoji included in the header. So 

### Get in touch 🙋‍♀️

is linked to as `https://github.com/cucumber#get-in-touch-%EF%B8%8F` which is hard to parse and easy to break should the the emoji change.

profile/README.md

@@ -5,7 +5,7 @@
   <img src="https://github.com/cucumber/cucumber-ruby/raw/main/docs/img/cucumber-open-logo.png" alt="Cucumber Open - Supported by Smartbear" width="428" />
 </p>
 
-## Welcome to Cucumber 👋
+## Welcome to Cucumber
 
 Cucumber is a tool for running automated acceptance tests, written in plain language. Because they're written in plain language, they can be read by anyone on your team. Because they can be read by anyone, they help improve communication, collaboration and trust on your team. 💖
 
@@ -19,7 +19,7 @@ Cucumber is open source, built and maintained by people just like you! All of th
 
 Everyone interacting in these codebases and issue trackers is expected to follow the [Cucumber Community Code of Conduct](https://cucumber.io/conduct).
 
-### Get in touch 🙋‍♀️
+### Get in touch
 
 If you have questions about using Cucumber, or ideas for how we could improve it, head over to our [GitHub Discussions](https://github.com/orgs/cucumber/discussions) forum. If you want chat with the maintainers, the best place for that is to join the [Community Slack](https://cucumber.io/community#slack)
 
@@ -42,7 +42,7 @@ Other popular Cucumber implementations, maintained by other organisations, are:
 If you're not sure where to raise your issue, you can use our [common](https://github.com/cucumber/common) repository, or 
 come and chat with us in the [community slack](https://cucumber.io/community#slack).
 
-### Get involved 🌈
+### Get involved
 
 The Cucumber team is committed to [tackling the structural racism and sexism](https://cucumber.io/blog/open-source/tackling-structural-racism-(and-sexism)-in-open-so/) 
 in open source, and providing a [fun and welcoming environment for new contributors](https://cucumber.io/docs/community/new-contributors/).