fix: revert version to 0.9.4 in Project.toml and update Changelog

Changelog.md

@@ -5,8 +5,6 @@ All notable changes to [`SecondQuantizedAlgebra.jl`](https://github.com/qojulia/
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [v0.9.5]
-
 ### Fixed
 
 - LaTeX rendering of an index whose name carries numeric per-slot suffixes no longer produces an invalid double subscript. As the pipeline transforms an index it accumulates suffixes through `(i::Index)(k)` (for example an index reaches `i_2_1` when a second distinct atom `i(2)` is later collapsed to its position-1 representative), and `_latex_index_suffix` emitted the name verbatim as `_{i_2_1}`. The unbraced `_2_1` is a double subscript that MathJax rejects with "Double subscripts: use braces to clarify", so the whole equation was left unrendered in Documenter pages and notebooks. The slot numbers are now joined into a single comma subscript (`i_2_1` renders as `i_{2,1}`); bare index names are unchanged.
@@ -300,5 +298,4 @@ These names keep their meaning across the migration. Code that only uses them sh
 [v0.9.2]: https://github.com/qojulia/SecondQuantizedAlgebra.jl/releases/tag/v0.9.2
 [v0.9.3]: https://github.com/qojulia/SecondQuantizedAlgebra.jl/releases/tag/v0.9.3
 [v0.9.4]: https://github.com/qojulia/SecondQuantizedAlgebra.jl/releases/tag/v0.9.4
-[v0.9.5]: https://github.com/qojulia/SecondQuantizedAlgebra.jl/releases/tag/v0.9.5
 [#156]: https://github.com/qojulia/SecondQuantizedAlgebra.jl/issues/156

Project.toml

@@ -1,6 +1,6 @@
 name = "SecondQuantizedAlgebra"
 uuid = "f7aa4685-e143-4cb6-a7f3-073579757907"
-version = "0.9.5"
+version = "0.9.4"
 
 [deps]
 Combinatorics = "861a8166-3701-5b0c-9a16-15d98fcdc6aa"