gh-87506: Document that json.load*() can raise UnicodeDecodeError

[srinivasreddy]

gh-87506: Improve the documentation for json.load() and json.loads()

[srinivasreddy]

Since @serhiy-storchaka moved this into JSON issues, I am raising this PR.
If @rhettinger still feel that it is okay to forgo this documentation update since we cannot,(should not) comprehensively document every exception. And in that case we can successfully close the issue.

[erlend-aasland]

@srinivasreddy, please pull in main and resolve the conflicts.

[cjw296]

@erlend-aasland - please bear in mind that "pull in main" results in an awful lot of unrelated folks getting spammed by this PR. Better would be to rebase the branch on main.

[methane]

rebase on main also trigger this PR corruption.
Recommended way is git pull upstream main.

See these:

• https://discuss.python.org/t/info-rebase-origin-master-push-f-workflow-corrupts-pull-request-rarely/2558
• improve instructions about merging in the step-by-step guide devguide#554

[erlend-aasland]

@erlend-aasland - please bear in mind that "pull in main" results in an awful lot of unrelated folks getting spammed by this PR. Better would be to rebase the branch on main.

This is absolutely not correct.

[erlend-aasland]

Thanks!

[bedevere-app]

GH-128607 is a backport of this pull request to the 3.13 branch.

[bedevere-app]

GH-128608 is a backport of this pull request to the 3.12 branch.