Describe the bug a clear and concise description of what the bug is.

https://github.com/prometheus-community/helm-charts/blob/main/charts/kube-prometheus-stack/templates/prometheus/rules-1.14/node-exporter.yaml#L697

The rule calculates only available memory and does not take into account free memory. I got the alert for this server:

# free -h
               total        used        free      shared  buff/cache   available
Mem:           3.5Gi       325Mi       3.0Gi       0.0Ki       280Mi        84Mi
Swap:             0B          0B          0B

What's your helm version?

version.BuildInfo{Version:"v3.13.2", GitCommit:"2a2fb3b98829f1e0be6fb18af2f6599e0f4e8243", GitTreeState:"clean", GoVersion:"go1.20.10"}

What's your kubectl version?

Client Version: version.Info{Major:"1", Minor:"26", GitVersion:"v1.26.10", GitCommit:"b8609d4dd75c5d6fba4a5eaa63a5507cb39a6e99", GitTreeState:"clean", BuildDate:"2023-10-18T11:44:31Z", GoVersion:"go1.20.10", Compiler:"gc", Platform:"linux/amd64"}

Which chart?

kube-prometheus-stack

What's the chart version?

58.6.1

What happened?

No response

What you expected to happen?

No response

How to reproduce it?

No response

Enter the changed values of values.yaml?

No response

Enter the command that you execute and failing/misfunctioning.

Anything else we need to know?

No response