bolt: Bump version from 5.0.0-rc2->5.1.0

-rc* makes the windows tests fail:

```
System.ArgumentException: The 'ModuleVersion' member is not valid in the module manifest file 'D:\a\openbolt\openbolt\pwsh_module\PuppetBolt\PuppetBolt.psd1': Cannot convert value "5.0.0-rc2" to type "System.Version". Error: "The input string '0-rc2' was not in a correct format."
  at <ScriptBlock>, D:\a\openbolt\openbolt\pwsh_module\autogenerated.tests.ps1: line 1
  at <ScriptBlock>, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 3090
  at Invoke-File, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 3099
  at Invoke-BlockContainer, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 3008
  at Discover-Test, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 1480
  at Invoke-Test, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 2474
  at Invoke-Pester<End>, C:\Users\runneradmin\Documents\PowerShell\Modules\Pester\5.7.1\Pester.psm1: line 4960
  at <ScriptBlock>, D:\a\_temp\c04d9e53-3555-4e44-855d-5de95da6a5f0.ps1: line 2
  at <ScriptBlock>, <No file>: line 1
```

Author: bastelfreak

lib/bolt/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Bolt
-  VERSION = '5.0.0-rc2'
+  VERSION = '5.1.0'
 end