Stabilize redundant-none-literal (PYI061) (#20236)

Tests and docs look good

Author: ntBre

crates/ruff_linter/src/codes.rs

@@ -831,7 +831,7 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Flake8Pyi, "058") => (RuleGroup::Stable, rules::flake8_pyi::rules::GeneratorReturnFromIterMethod),
         (Flake8Pyi, "057") => (RuleGroup::Stable, rules::flake8_pyi::rules::ByteStringUsage),
         (Flake8Pyi, "059") => (RuleGroup::Stable, rules::flake8_pyi::rules::GenericNotLastBaseClass),
-        (Flake8Pyi, "061") => (RuleGroup::Preview, rules::flake8_pyi::rules::RedundantNoneLiteral),
+        (Flake8Pyi, "061") => (RuleGroup::Stable, rules::flake8_pyi::rules::RedundantNoneLiteral),
         (Flake8Pyi, "062") => (RuleGroup::Stable, rules::flake8_pyi::rules::DuplicateLiteralMember),
         (Flake8Pyi, "063") => (RuleGroup::Stable, rules::flake8_pyi::rules::Pep484StylePositionalOnlyParameter),
         (Flake8Pyi, "064") => (RuleGroup::Stable, rules::flake8_pyi::rules::RedundantFinalLiteral),