Add critical type for changelog entries

README.md

@@ -234,7 +234,7 @@ pull request need to be added to the folder `changelog.d/`.
 The name of the file consists of three parts seperated by a period:
 1. The identifier, either the issue number this pull request is refering to or if
 there is no related issue a `+` followed by a unique short description.
-2. The type of the change, we use `added`, `changed` and `fixed`.
+2. The type of the change, we use `critical`, `added`, `changed` and `fixed`.
 3. The file suffix, e.g. `.md`, towncrier does not care which suffix a fragment has.
 
 So an example for a file name linked to an issue would be `214.added.md` or for a file

pyproject.toml

@@ -115,6 +115,11 @@ title_format = "## [{version}] - {project_date}"
 issue_format = "[#{issue}](https://github.com/Uninett/Argus/issues/{issue})"
 wrap = true
 
+[[tool.towncrier.type]]
+directory = "critical"
+name = "Critical"
+showcontent = true
+
 [[tool.towncrier.type]]
 directory = "added"
 name = "Added"