chore(deps): update helm chart cstor to v2.6.0

[xunholy]

This PR contains the following updates:

Package	Update	Change
cstor (source)	minor	2.5.3 -> 2.6.0

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Release Notes

openebs/cstor-operators

v2.6.0

Compare Source

• refact(charts): add pod security policy for cstor charts #​249 (prateekpandey14)
• refact(webhook): refactor namespace validation steps #​247 (prateekpandey14)
• fix(webhook): cleanup validatingwebhook config on openebs namespace deletion #​246 (prateekpandey14)
• feat(ci): auto-assign github PR reviewers and assignee using github-action #​166 (prateekpandey14)
• admission-webhook.cstor.openebs.io validation of compression arguments in CStorPoolCluster #​237
• refact(crds): update upgradetask and cstorvolumeattachment to v1 #​242 (prateekpandey14)
• fix(webhook): allow cspc validation based on supported compression algos #​241 (prateekpandey14)
• fix(charts): make the cvc operator service labels consistent with operator #​239 (shubham14bajpai)
• wrong helm repo/chart name #​233 (survivant)
• [stable/cstor]: update dependent NDM charts to 1.1.1 #​231 (akhilerm)
• [stable/cstor]: update cstor charts to 2.5.0 #​229 (akhilerm)
• chore(docs): update snapshot docs to include api version info #​228 (prateekpandey14)
• fix(action): fix cstor pool and volume manager image names #​227 (prateekpandey14)

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