add example slide

2022/2022-05-31_git-trilogy-part-1/slides/example.md

+# Complete example
+
+Task: add your name to the list of attendees in the practice repository.
+
+- Repository: [https://gitlab.lcsb.uni.lu/R3/school/git/basic-practice-pages](https://gitlab.lcsb.uni.lu/R3/school/git/basic-practice-pages)
+- Development Branch: `develop`
+- Website: [https://r3.pages.uni.lu/school/git/basic-practice-pages](https://r3.pages.uni.lu/school/git/basic-practice-pages)
+
+
+<img src="slides/img/icon-live-demo.png" height="100px">