Merge pull request #200217 from ryantm/doc-fix

nixpkgs/doc: fix admonition syntax

Author: infinisil

doc/builders/images/portableservice.section.md

@@ -15,7 +15,7 @@ This allows using Nix to build images which can be run on many recent Linux dist
 The primary tool for interacting with Portable Services is `portablectl`,
 and they are managed by the `systemd-portabled` system service.
 
-:::{.note}
+::: {.note}
 Portable services are supported starting with systemd 239 (released on 2018-06-22).
 :::
 
@@ -37,7 +37,7 @@ dependencies of the two derivations in the `units` list.
 `units` must be a list of derivations, and their names must be prefixed with the service name (`"demo"` in this case).
 Otherwise `systemd-portabled` will ignore them.
 
-:::{.Note}
+::: {.note}
 The `.raw` file extension of the image is required by the portable services specification.
 :::
 
@@ -76,6 +76,6 @@ portablectl attach demo_1.0.raw
 systemctl enable --now demo.socket
 systemctl enable --now demo.service
 ```
-:::{.Note}
+::: {.note}
 See the [man page](https://www.freedesktop.org/software/systemd/man/portablectl.html) of `portablectl` for more info on its usage.
 :::

doc/contributing/coding-conventions.chapter.md

@@ -489,7 +489,7 @@ Preferred source hash type is sha256. There are several ways to get it.
    
    in the package expression, attempt build and extract correct hash from error messages.
 
-   :::{.warning}
+   ::: {.warning}
    You must use one of these four fake hashes and not some arbitrarily-chosen hash.
    
    See [](#sec-source-hashes-security).