Fix observation templates

[olelod]

The yamlobs jinja template has some bugs in it for writing observations of injection

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Contributor checklist

• [x] :tada: This PR closes #390.
• [x] :scroll: I have broken down my PR into the following tasks:
  • [x] Fix error im yamlobs templat
• [ ] :robot: I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR.
• [ ] :book: I have considered adding a new entry in CHANGELOG.md.
• [ ] :books: I have considered updating the documentation.