unpin openresty and update plan.sh

[poorndm]

Description

[Please describe what this change achieves]

Issues Resolved

[List any existing issues this PR resolves, or any Discourse or StackOverflow discussions that are relevant]

Check List

• [ ] New functionality includes tests
• [ ] All buildkite tests pass
• [ ] Full omnibus build and tests in buildkite pass
• [x] All commits have been signed-off for the Developer Certificate of Origin. See https://github.com/chef/chef/blob/main/CONTRIBUTING.md#developer-certification-of-origin-dco
• [x] PR title is a worthy inclusion in the CHANGELOG

[netlify[bot]]

👷 Deploy Preview for chef-server processing.

Name	Link
🔨 Latest commit	f9048ee82653a2fd8a2b5c4b8e66b669acd1383b
🔍 Latest deploy log	https://app.netlify.com/sites/chef-server/deploys/662f4128d9af390008481eb0

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarqube-for-infrastructure-prod[bot]]

SonarQube Quality Gate

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[poorndm]

https://buildkite.com/chef/chef-chef-server-main-omnibus-adhoc/builds/6174 - Build Passed

[sreepuramsudheer]

Adhoc : https://buildkite.com/chef/chef-chef-server-main-omnibus-adhoc/builds/6295 Umbrella: https://buildkite.com/chef/chef-umbrella-main-chef-server/builds/2501

[sonarqubecloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
1 Security Hotspot
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[sonarqube-for-infrastructure-prod[bot]]

SonarQube Quality Gate

0.0% Security Hotspots Reviewed on New Code (is less than 100%)

See analysis details on SonarQube