Update quay.io/linuxserver.io/code-server Docker tag to v4.16.1

#### 📖 Summary

<!-- Provide a summary of your changes. Describe the why and not how. -->

#### 📑 Test Plan

> 💡 Select your test plan for the code changes.

| Choice | Test Method       |
| :----: | :-----------      |
|   ✅   | CI pipeline tests |
|        | Custom test       |
|        | No test plan      |

##### Details / Justification

<!-- Add your test details or justification for missing tests here. -->

#### 📚 Additional Notes

<!-- A place for additional detail notes. -->

Co-authored-by: OCram85 <marco.blessing@googlemail.com>
Reviewed-on: CodeServer/arkanum#60

arkanum

@@ -156,6 +156,7 @@ function instVolta() {
 
 function instPwsh() {
   say "Installing PowerShell requirements..." "PowerShell"
+  sudo -E apt-get update > /dev/null
   sudo -E apt-get install --no-install-recommends -y \
     apt-transport-https \
     software-properties-common