Fix Hugo version in postsubmit workflow to resolve build errors

[xuezhaojun]

Problem

The postsubmit GitHub action was failing with the following error:

WARN  Module "open-cluster-management.io/open-cluster-management-io.github.io" is not compatible with this Hugo version: Min 0.146.0 extended
WARN  Module "github.com/google/docsy" is not compatible with this Hugo version: Min 0.146.0 extended
Error: error building site: parse failed: template: _partials/scripts/katex.html:6: function "try" not defined

Root Cause

• The hugo.yaml configuration file specifies a minimum Hugo version requirement of 0.146.0 extended
• The postsubmit workflow was using Hugo version 0.125.5
• The try function used in KaTeX templates is only available in newer Hugo versions

Solution

Update the Hugo version in .github/workflows/postsubmit.yml from 0.125.5 to 0.146.0 to match the minimum version requirement.

Testing

• ✅ Local build with Hugo v0.147.8 works successfully
• ✅ The presubmit workflow already uses the correct Hugo version (0.146.0)
• ✅ No breaking changes expected as this only updates to the minimum required version

Changes

• Updated Hugo version in postsubmit workflow from 0.125.5 to 0.146.0
• Maintained extended: true configuration

This fix ensures the postsubmit workflow uses a Hugo version that is compatible with the project's requirements and supports all the template functions being used.

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Pull Request opened by Augment Code with guidance from the PR author

[openshift-ci]

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