Update README.md

Author: yebai

README.md

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 # SSMProblems.jl
 
-[![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://turinglang.org/SSMProblems.jl/SSMProblems/stable)
-[![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://turinglang.org/SSMProblems.jl/SSMProblems/dev/)
 [![Code Style: Blue](https://img.shields.io/badge/code%20style-blue-4495d1.svg)](https://github.com/invenia/BlueStyle)
 [![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)
 <!--[![Build Status](https://github.com/TuringLang/SSMProblems.jl/workflows/CI/badge.svg?branch=master)](https://github.com/TuringLang/SSMProblems.jl/actions?query=workflow%3ACI%20branch%3Amaster) -->
 
+|           Package            |                                                                                                                                                    Docs                                                                                                                                                    |
+| :--------------------------: | :--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: |
+|   SSMProblems   |   [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://turinglang.org/SSMProblems.jl/SSMProblems/dev/)        |
+| GeneralisedFilters | [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://turinglang.org/SSMProblems.jl/GeneralisedFilters/dev/)|
 
 A minimalist framework to define state space models (SSMs) and their associated
 log-densities to feed into inference algorithms.