Update dependency astro to v5.16.4

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
astro (source)	5.16.2 -> 5.16.4

---

Release Notes

withastro/astro (astro)

v5.16.4

Compare Source

Patch Changes

• #​14940 2cf79c2 Thanks @​ematipico! - Fixes a bug where Astro didn't properly combine CSP resources from the csp configuration with those added using the runtime API (Astro.csp.insertDirective()) to form grammatically correct CSP headers

  Now Astro correctly deduplicate CSP resources. For example, if you have a global resource in the configuration file, and then you add a
  a new one using the runtime APIs.

v5.16.3

Compare Source

Patch Changes

• #​14889 4bceeb0 Thanks @​florian-lefebvre! - Fixes actions types when using specific TypeScript configurations

• #​14929 e0f277d Thanks @​matthewp! - Fixes authentication bypass via double URL encoding in middleware

  Prevents attackers from bypassing path-based authentication checks using multi-level URL encoding (e.g., /%2561dmin instead of /%61dmin). Pathnames are now validated after decoding to ensure no additional encoding remains.

---

Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[netlify]

✅ Deploy Preview for mmert9008-astroblogtutorial ready!

Name	Link
🔨 Latest commit	591d378
🔍 Latest deploy log	https://app.netlify.com/projects/mmert9008-astroblogtutorial/deploys/693094435dd11b0009d372a7
😎 Deploy Preview	https://deploy-preview-22--mmert9008-astroblogtutorial.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.