feat: update appVersion to 2.16.0 for scraper and 0.16.0 for resource discovery

[khalilCodeX]

Summary

Ship Helm chart releases for the new agent images Tom published to GHCR on 2026-05-22:

Image	New tag
promitor-agent-scraper	2.16.0
promitor-agent-resource-discovery	0.16.0

Both image tags are already pushed and tagged latest on GHCR; this PR brings the Helm chart index up to date so downstream consumers (who pin via charts.promitor.io) actually receive them.

Context: the new images include the FedRAMP-related fix. The Helm chart ships its own pinned image reference via appVersion, so a chart release is required for the bump to propagate.

Changes

• promitor-agent-scraper/Chart.yaml: version + appVersion → 2.16.0
• promitor-agent-resource-discovery/Chart.yaml: version + appVersion → 0.16.0
• docs/promitor-agent-scraper-2.16.0.tgz (new package)
• docs/promitor-agent-resource-discovery-0.16.0.tgz (new package)
• docs/index.yaml regenerated via helm repo index docs --url https://charts.promitor.io --merge docs/index.yaml

values.yaml is intentionally unchanged — image.tag is empty and the deployment templates default to .Chart.AppVersion, matching the v2.15.0 release precedent (#196).

Verification

• helm lint passes on both charts
• helm template renders the expected image references:
  • containers.promitor.io/tomkerkhove/promitor-agent-scraper:2.16.0
  • containers.promitor.io/tomkerkhove/promitor-agent-resource-discovery:0.16.0

Follow-up

After merge, cut the GitHub releases per the CONTRIBUTING.md template (Scraper-v2.16.0 and ResourceDiscovery-v0.16.0).

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.

---

Khalil Sayed seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}