Fix minimum PowerShell version to be 7.0.11 instead of 7.1.7 by bergmeister · Pull Request #1830 · PowerShell/PSScriptAnalyzer

PR Summary

This is to fix the mistake made in PR #1769. Since 7.0* is an LTS version that is still supported, it needs to be included. Choosing path version 11 and not 12 number 12 is quite recent and versions before a patch are still supported for 30 days.

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Change is not breaking
• Make sure all .cs, .ps1 and .psm1 files have the correct copyright header
• Make sure you've added a new test if existing tests do not effectively test the code changed and/or updated documentation
• This PR is ready to merge and is not Work in Progress.
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