add tagg to committed git code example

Example 1: create a tag from a commit/branch

git tag -a version.number -m "Tag Message"
git push origin <tagname>

Example 2: git create tag and push

$ git push origin v1.4
Counting objects: 14, done.
Delta compression using up to 8 threads.
Compressing objects: 100% (12/12), done.
Writing objects: 100% (14/14), 2.05 KiB | 0 bytes/s, done.
Total 14 (delta 3), reused 0 (delta 0)
To [email protected]:atlasbro/gittagdocs.git
* [new tag] v1.4 -> v1.4