Bump PSModule/Install-PSModuleHelpers from 1.0.7 to 1.0.8

Bumps [PSModule/Install-PSModuleHelpers](https://github.com/psmodule/install-psmodulehelpers) from 1.0.7 to 1.0.8.
- [Release notes](https://github.com/psmodule/install-psmodulehelpers/releases)
- [Commits](PSModule/Install-PSModuleHelpers@ed79b6e...68e8ca7)

---
updated-dependencies:
- dependency-name: PSModule/Install-PSModuleHelpers
  dependency-version: 1.0.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

action.yml

@@ -46,7 +46,7 @@ runs:
   using: composite
   steps:
     - name: Install-PSModuleHelpers
-      uses: PSModule/Install-PSModuleHelpers@ed79b6e3aa8c9cd3d30ab2bf02ea6bd4687b9c74 # v1.0.7
+      uses: PSModule/Install-PSModuleHelpers@68e8ca76be679bfcb7099aed8cffa911c4ab72af # v1.0.8
 
     - name: Update Microsoft.PowerShell.PSResourceGet
       shell: pwsh