Prometheus retention

[optimadba]

I've looked at the solution as per # #1395 regarding setting a longer retention for prometheus than the default 24h.

What I've done is:
jb update
edited example.jsonnet to look like the following:
``

prometheus+:: {
prometheus+: {
spec+: {
// If retention not specified, default will be '--storage.tsdb.retention=24h' passed to prometheus by prometheus-operator.
retention: '27d',
retentionSize: '8GB',
walCompression: true,
storage: {
volumeClaimTemplate: {
apiVersion: 'v1',
kind: 'PersistentVolumeClaim',
spec: {
accessModes: ['ReadWriteOnce'],
resources: { requests: { storage: '10Gi' } },
storageClassName: 'standard-encrypted',
}, // spec inner
}, // VolumeClaim
}, // storage
}, // spec outer
}, // prometheus inner
// namespaces: []
}, //Prometheus outer``

     
run build.sh
do a recursive grep for 27d, but this is not found

Surely this is a simple thing I'm overlooking, but I'm by no means an expert in jsonnet and the likes.