Bump powershell

Bumps powershell from `73c0840` to `756dae7`.

---
updated-dependencies:
- dependency-name: powershell
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

tools/releaseBuild/Images/microsoft_powershell_ubuntu18.04/Dockerfile

@@ -1,5 +1,5 @@
 # Docker image file that describes an Ubuntu16.04 image with PowerShell and SnapCraft installed from Microsoft APT Repo
-FROM mcr.microsoft.com/powershell:ubuntu-22.04@sha256:73c08403182e3cd1a62176b6723645b2d2037cda8deefc0e2c2c01cb814abe43
+FROM mcr.microsoft.com/powershell:ubuntu-22.04@sha256:756dae797891cecc5a732c87695dc984c81b5ef755060c15073191996f71fc92
 
 ARG SNAPCRAFT_CHANNEL=stable