docs: update implementations.md with Chapel's language server

Implementations.md

@@ -3,6 +3,7 @@
 | Name                     | Maintainer                                                            | Repository (optional)                                                      | Notes                                                                                                                         |
 |--------------------------|-----------------------------------------------------------------------|----------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------|
 | _Anakin Language Server_ | [Andrii Kolomoiets](https://github.com/muffinmad) | [anakin-language-server](https://github.com/muffinmad/anakin-language-server) | Yet another Jedi Python Language Server |
+| _Chapel Language Server_ | [Chapel Team](https://github.com/chapel-lang) | [chapel](https://github.com/chapel-lang/chapel/tree/main/tools/chpl-language-server) | [Chapel](https://chapel-lang.org/) language server |
 | _Cmake Language Server_  | [Regen100](https://github.com/regen100)                               | [cmake-language-server](https://github.com/regen100/cmake-language-server) | CMake LSP Implementation
 | _Codify Language Server_ | [Open Law Library](http://www.openlawlib.org/)                        | (closed source)                                                                     | Used in our VS Code extension, _[Codify](https://marketplace.visualstudio.com/items?itemName=openlawlibrary.open-law-codify)_ |
 | _CrossHair Language Server_ | [Phillip Schanely](http://github.com/pschanely)                    | [CrossHair](https://github.com/pschanely/CrossHair)                        | Supports [this VS Code extension](https://marketplace.visualstudio.com/items?itemName=CrossHair.crosshair) for Python contract testing. |