Fix documentation navigation for gridscale_paas_securityzone

[Copilot]

This PR fixes an issue where the Terraform Registry documentation was displaying "gridscale_securityzone" in the left sidebar navigation instead of the correct resource name "gridscale_paas_securityzone".

Problem

The sidebar navigation in the Terraform Registry docs showed an incorrect resource name due to mismatched sidebar_current values between the documentation files and the navigation template.

Root Cause

The sidebar_current metadata in both the resource and data source documentation files did not match the corresponding references in website/gridscale.erb:

• Navigation template expected: "docs-gridscale-resource-paas-securityzone"

• Resource doc had: "docs-gridscale-resource-securityzone" ❌

• Navigation template expected: "docs-gridscale-datasource-paas-securityzone"

• Data source doc had: "docs-gridscale-datasource-securityzone" ❌

Solution

Updated the sidebar_current values in both documentation files to match the navigation template:

• website/docs/r/securityzone.html.md: Updated to "docs-gridscale-resource-paas-securityzone"
• website/docs/d/securityzone.html.md: Updated to "docs-gridscale-datasource-paas-securityzone"

This ensures the sidebar navigation correctly displays "gridscale_paas_securityzone" for both the resource and data source documentation pages.

Verification

• ✅ Build passes without issues
• ✅ Navigation references now match documentation metadata
• ✅ No other files required changes
• ✅ Minimal, surgical fix with only 2 lines changed total

Closes #[issue_number]

Original prompt

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This section details on the original issue you should resolve

<issue_title>Docs: wrong name of "gridscale_paas_securityzone" in tree on the left</issue_title>
<issue_description>The docs available on Terraform's registry list the resource name as gridscale_securityzone in its index on the left, even though the contents on the right use the correct name gridscale_paas_securityzone. My guess is that this is due to the corresponding file having the wrong name.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #200

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