Update documentation on RuntimeMethodHandle.GetFunctionPointer

[jkoritzinsky]

Update the documentation on RuntimeMethodHandle.GetFunctionPointer now that we have function pointers in C# based on the discussion in dotnet/runtime#65853.

[AaronRobinsonMSFT]

/cc @gewarren

[opbld34]

Docs Build status updates of commit 4dab6b0:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
xml/System/RuntimeMethodHandle.xml	⚠️Warning	View	Details

xml/System/RuntimeMethodHandle.xml

• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.
• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.

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[gewarren]

I broke it out into two paragraphs - but also fine as-is if you don't like the suggestion.

[opbld31]

Docs Build status updates of commit 2aaec14:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
xml/System/RuntimeMethodHandle.xml	⚠️Warning	View	Details

xml/System/RuntimeMethodHandle.xml

• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.
• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.

For more details, please refer to the build report.

If you see build warnings/errors with permission issues, it might be due to single sign-on (SSO) enabled on Microsoft's GitHub organizations. Please follow instructions here to re-authorize your GitHub account to Docs Build.

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.

Note: Your PR may contain errors or warnings unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

For any questions, please:

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[opbld33]

Docs Build status updates of commit 0ee4430:

⚠️ Validation status: warnings

File	Status	Preview URL	Details
xml/System/RuntimeMethodHandle.xml	⚠️Warning	View	Details

xml/System/RuntimeMethodHandle.xml

• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.
• Line 0, Column 0: [Warning: xref-not-found] Cross reference not found: 'System.Runtime.InteropServices.UnmanagedCallersOnlyAttribute*'.

For more details, please refer to the build report.

If you see build warnings/errors with permission issues, it might be due to single sign-on (SSO) enabled on Microsoft's GitHub organizations. Please follow instructions here to re-authorize your GitHub account to Docs Build.

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.

Note: Your PR may contain errors or warnings unrelated to the files you changed. This happens when external dependencies like GitHub alias, Microsoft alias, cross repo links are updated. Please use these instructions to resolve them.

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[gewarren]

Fixed the xrefs.

[opbld34]

Docs Build status updates of commit 663d97e:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System/RuntimeMethodHandle.xml	✅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.

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