context: fix outdated documentation

[adeel26in]

Hello maintainers,

This change modifies the documentation provided for "context" package in the standard library. The documentation provided was outdated but now has been fixed.

NOTE: Due to my account being under 18 I can't access Gerrit.

Fixes: #77478

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Patch Set 1:

(1 comment)

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Patch Set 1:

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[adeel26in]

Done!

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Message from Damien Neil:

Patch Set 3: Commit message was updated.

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Message from Damien Neil:

Patch Set 4: Commit message was updated.

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Patch Set 4: Commit-Queue+1

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Patch Set 4: Code-Review+2

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Patch Set 4: Code-Review+2

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Patch Set 4: Code-Review+1

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Patch Set 5: -Commit-Queue

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Patch Set 5: Code-Review+2 Commit-Queue+1

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