Improve *.md files to clear out warnings

[XAML-Knight]

Fixes #577

Docs for Toolkit PR none

What changes to the docs does this PR provide?

Cleans up Docs build warnings & suggestions.

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] Correctly picked the right branch to base the change off (dev for new features, master for typos/improvements)
• [ ] For new pages, used the provided template
• [ ] For new features, added an entry in the Table of Contents
• [ ] Ran against a spell and grammar checker
• [x] Contains NO breaking changes

Other information

[opbld33]

Docs Build status updates of commit 7271f40:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/helpers/Converters.md	:bulb:Suggestion	View	Details
docs/animations/lottie-scenarios/getting_started_json.md	:white_check_mark:Succeeded	View
docs/helpers/SystemInformation.md	:white_check_mark:Succeeded	View
docs/notifications/NotificationsOverview.md	:white_check_mark:Succeeded	View
docs/services/GraphLogin.md	:white_check_mark:Succeeded	View

docs/helpers/Converters.md

• Line 23, Column 155: [Suggestion-preserve-view-not-set] Did you mean to link to a specific version? It's usually better not to specify a version, so the link always goes to the canonical version. If you really need to link to a specific version, add &preserve-view=true to the URL: /dotnet/api/system.string.format?view=netframework-4.7. Otherwise, remove the view parameter.
• Line 25, Column 206: [Suggestion-preserve-view-not-set] Did you mean to link to a specific version? It's usually better not to specify a version, so the link always goes to the canonical version. If you really need to link to a specific version, add &preserve-view=true to the URL: /dotnet/api/system.string.format?view=netframework-4.7. Otherwise, remove the view parameter.
• Line 155, Column 86: [Suggestion-preserve-view-not-set] Did you mean to link to a specific version? It's usually better not to specify a version, so the link always goes to the canonical version. If you really need to link to a specific version, add &preserve-view=true to the URL: /dotnet/api/system.string.format?view=netframework-4.7. Otherwise, remove the view parameter.

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel

[opbld31]

Docs Build status updates of commit 801fef8:

:white_check_mark: Validation status: passed

File	Status	Preview URL	Details
docs/animations/lottie-scenarios/getting_started_json.md	:white_check_mark:Succeeded	View
docs/helpers/Converters.md	:white_check_mark:Succeeded	View
docs/helpers/SystemInformation.md	:white_check_mark:Succeeded	View
docs/notifications/NotificationsOverview.md	:white_check_mark:Succeeded	View
docs/services/GraphLogin.md	:white_check_mark:Succeeded	View

For more details, please refer to the build report.

Note: Broken links written as relative paths are included in the above build report. For broken links written as absolute paths or external URLs, see the broken link report.

For any questions, please:

• Try searching the docs.microsoft.com contributor guides
• Post your question in the Docs support channel