pssa(github action): use checkout v6

Author: alagoutte

.github/workflows/PSScriptAnalyzer.yml

@@ -5,7 +5,7 @@ jobs:
         name: Run PSScriptAnalyzer
         runs-on: ubuntu-latest
         steps:
-            - uses: actions/checkout@v5
+            - uses: actions/checkout@v6
             - name: lint
               uses: alagoutte/github-action-psscriptanalyzer@master
               with: