build(deps): bump github.com/spf13/cobra from 1.5.0 to 1.6.0

Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.5.0 to 1.6.0.
- [Release notes](https://github.com/spf13/cobra/releases)
- [Commits](https://github.com/spf13/cobra/compare/v1.5.0...v1.6.0)

---
updated-dependencies:
- dependency-name: github.com/spf13/cobra
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

PH: manually update the completion scripts and fix deprecated function
call.

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

vendor/github.com/spf13/cobra/flag_groups.go

@@ -1,9 +1,10 @@
-// Copyright © 2022 Steve Francia <spf@spf13.com>.
+// Copyright 2013-2022 The Cobra Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
-// http://www.apache.org/licenses/LICENSE-2.0
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
@@ -58,9 +59,9 @@ func (c *Command) MarkFlagsMutuallyExclusive(flagNames ...string) {
 	}
 }
 
-// validateFlagGroups validates the mutuallyExclusive/requiredAsGroup logic and returns the
+// ValidateFlagGroups validates the mutuallyExclusive/requiredAsGroup logic and returns the
 // first error encountered.
-func (c *Command) validateFlagGroups() error {
+func (c *Command) ValidateFlagGroups() error {
 	if c.DisableFlagParsing {
 		return nil
 	}