Exception changes for Deserialize<char>

[gewarren]

Contributes to dotnet/docs#20815.

Preview link.

[opbld30]

Docs Build status updates of commit 4db38a3:

🕙 Pending: waiting for processors (11 builds ahead of you)

⚠️ Docs Build is busy, currently there are 11 builds ahead of this one, for more information you can view the Build queue graph on the Docs Portal.

[opbld30]

Docs Build status updates of commit 3188ab9:

🕙 Pending: waiting for processors (10 builds ahead of you)

⚠️ Docs Build is busy, currently there are 10 builds ahead of this one, for more information you can view the Build queue graph on the Docs Portal.

[opbld30]

Docs Build status updates of commit 3188ab9:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Text.Json/JsonSerializer.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.

For any questions, please:

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[opbld32]

Docs Build status updates of commit 3efff67:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Text.Json/JsonSerializer.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.

For any questions, please:

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[opbld31]

Docs Build status updates of commit 8a0618c:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Text.Json/JsonSerializer.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.

For any questions, please:

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[opbld31]

Docs Build status updates of commit 8a218dd:

✅ Validation status: passed

File	Status	Preview URL	Details
xml/System.Text.Json/JsonSerializer.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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[buyaa-n]

LGTM, thanks!

[ahsonkhan]

This is unnecessary info to the user, and isn't totally accurate. Please revert this part of the change and remove this sentence.