fix: extension workspace version

[surajsbharadwaj]

Description

update powervs workspace version to 1.5.0

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• [ ] Patch release (x.x.X)
• [x] Minor release (x.X.x)
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[surajsbharadwaj]

/run pipeline

[terraform-ibm-modules-ops]

:tada: This PR is included in version 4.2.0 :tada:

The release is available on:

• GitHub release
• v4.2.0

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