[xray] Fix `volumeMounts` formatting for `panoramic`

[rhys96]

PR Checklist

[Place an '[x]' (no spaces) in all applicable fields. Please remove unrelated fields.]

• [x] Chart Version bumped
• [x] CHANGELOG.md updated
• [x] Variables and other changes are documented in the README.md
• [x] Title of the PR starts with chart name (e.g. [artifactory])

What this PR does / why we need it:

This resolves the bug caused when additional volume mounts are added to the deployment. The initial panoramic volume mount has an additional 2 spaces which causes additional volume mounts to be out of alignment.

Which issue this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close that issue when PR gets merged): fixes #1895

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[rhys96]

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[rhys96]

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