typo in documentation for System.BitConverter

[AndrewCHall]

Minor importance

the string "Returns a laft-precision floating point number"

should read

"Returns a half-precision floating point number"

seen on web page https://learn.microsoft.com/en-us/dotnet/api/system.bitconverter?view=net-8.0&redirectedfrom=MSDN

[dotnet-issue-labeler]

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