Typo in `_GUARD_BOTH_UNICODE` dsl

[ordinary-jamie]

Bug report

Bug description:

There appears to be a typo in the optimizer_bytecodes for _GUARD_BOTH_UNICODE where the right operand is not getting checked:

cpython/Python/optimizer_bytecodes.c

Lines 163 to 169 in 5e73ece

	op(_GUARD_BOTH_UNICODE, (left, right -- left, right)) {
	if (sym_matches_type(left, &PyUnicode_Type) &&
	sym_matches_type(right, &PyUnicode_Type)) {
	REPLACE_OP(this_instr, _NOP, 0 ,0);
	}
	sym_set_type(left, &PyUnicode_Type);
	sym_set_type(left, &PyUnicode_Type);

Original change from gh-118910:

https://github.com/python/cpython/pull/118913/files#diff-e5bd2b14b0b10f0f47786e26306d689ed1361c3dc3b11dcc3ea52b8a2422ff64L151-R141

N.b. I'm not very familiar with this part of the code-base and just happened to stumble upon this when studying through it; apologies if I misunderstood something 🙏

CPython versions tested on:

3.14, CPython main branch

Operating systems tested on:

No response

Linked PRs

• GH-130903: typo in optimizer DSL for _GUARD_BOTH_UNICODE #130904