Add release notes for version 0.41

docs/input/blog/posts/2021-07-19-spectre-console-0.41-released.md

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+Title: Spectre.Console 0.41 released!
+Description: In this release we (mostly Phil) have been focusing on getting the new fancy Roslyn Analyzers out the door...<br /><br /><br /><br /><br />[More]
+Published: 20210719
+Category: Release Notes
+Excluded: false
+---
+
+In this release, we (mostly [Phil](https://twitter.com/philco78)) have been focusing on getting the new fancy Roslyn Analyzers out the door.
+If you want to try them out, add a reference to [Spectre.Console.Analyzer](https://www.nuget.org/packages/spectre.console.analyzer) in your project, and you should get some best practice tips in your favorite IDE!
+
+It's summer in the northern hemisphere, so it will probably be a couple of weeks until the next release.
+
+## Features
+
+* [#417 - Support cancellation in prompts](https://github.com/spectreconsole/spectre.console/issues/417)
+* [#324 - Remove AsciiTreeGuide as default tree guide](https://github.com/spectreconsole/spectre.console/issues/324)
+* [#413 - Support custom characters at the end of a TextPrompt](https://github.com/spectreconsole/spectre.console/issues/413)
+* [#447 - Alternative to the obsolete 'Select' function for selecting default items in SelectionPrompt](https://github.com/spectreconsole/spectre.console/issues/447)
+* [#460 - Default values for Ask()](https://github.com/spectreconsole/spectre.console/issues/460)
+
+## Bugs
+
+* [#480 - IAnsiConsole.Confirm extension is missing default value parameter](https://github.com/spectreconsole/spectre.console/issues/480)
+* [#442 - Allow dynamic Figlet hardblank](https://github.com/spectreconsole/spectre.console/pull/442)