docs: Update outdated documentation of Context

[acheroncrypto]

Problem

As mentioned in #3529, the documentation of Context is outdated:

anchor/docs/content/docs/basics/program-structure.mdx

Lines 148 to 160 in 7ab0bec

	pub struct Context<'a, 'b, 'c, 'info, T> {
	/// Currently executing program id.
	pub program_id: &'a Pubkey,
	/// Deserialized accounts.
	pub accounts: &'b mut T,
	/// Remaining accounts given but not deserialized or validated.
	/// Be very careful when using this directly.
	pub remaining_accounts: &'c [AccountInfo<'info>],
	/// Bump seeds found during constraint validation. This is provided as a
	/// convenience so that handlers don't have to recalculate bump seeds or
	/// pass them in as arguments.
	pub bumps: BTreeMap<String, u8>,
	}

Summary of changes

Update the outdated documentation of Context to match the current definition.

#3529

[vercel]

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