Replace a placholder in a file with git commit short sha

Question

I have in a file a placeholder GitHash and want to replace this with the git commit short sha hash and use sed for example.

This should be done in a pipeline job in GitLab.

So I wrote following into my .gitlab-ci.yml file:

set-revesion:
  image: registry.gitlab.com/gitlab-org/release-cli:latest
  stage: Set
  script: 
    - apk update
    - apk add zip # Because it is a .odt which needs to be unpacked
    - mkdir MyFile
    - unzip MyFile.odt -d unpack
    - cd unpack
    - sed -e 's|GitHash|${$CI_COMMIT_SHORT_SHA}|g' -i content.xml
    - sed -e 's|GitHash|${$CI_COMMIT_SHORT_SHA}|g' -i styles.xml
    - zip -r ../MyFile/MyFile.odt .
  artifacts:
    when: always
    paths:
      - Specification/