docs(common-library): Added mountPath field to NFS share

[ModestTG]

Description of the change

Added

Added mountPath to documentation.

Benefits

This helps clarify where an NFS share will be mounted within a given Pod.

Checklist

• [X] Title of the PR conforms to the Conventional Commits standard.
• [X] Scope of the of the PR title contains the chart name.

[ModestTG]

Changes accepted!