lxd: Cherry-pick doc pin version of myst-parser (latest-candidate)

Signed-off-by: Thomas Parrott <[email protected]>

snapcraft.yaml

@@ -1371,6 +1371,7 @@ parts:
       git cherry-pick -x 81de9aaae166f204bd0901fbd0abb46582e87684 # lxd/api/metrics: Avoid repeated calls to wg.Add in metricsGet
       git cherry-pick -x 5ddbe0849827421669ec6633bc5d1bb5a8e8d7cc # lxd/config/default: Add images to DefaultRemotes
       git cherry-pick -x cc890c8c4a39e9b52f69fc66640fbffdc2ab2e9f # lxd/device/device_utils_disk: fix diskAddRootUserNSEntry to add root mapping only if it's required
+      git cherry-pick -x 4080e9f406b67ec255706562dab36708947840e1 # doc: pin version of myst-parser
 
       # Setup build environment
       export GOPATH="$(realpath ./.go)"