fix(ast_grep): invalid filetypes #4253

Problem:

`csharp` is not a valid filetype in neovim. csharp files are of filetype `cs`.

You can see a warning by doing
```lua
vim.ls.enable({ "ast_grep"})
```

`:checkheatlh lsp` or `:LspInfo` shows this warning:
```
vim.lsp: Enabled Configurations
⚠️  WARNING Unknown filetype 'csharp' (Hint: filename extension != filetype).
```

1 files changed, 1 insertions, 3 deletions

diff --git a/lsp/ast_grep.lua b/lsp/ast_grep.lua
index 0cf9e72d..5ac225f1 100644
--- a/lsp/ast_grep.lua
+++ b/lsp/ast_grep.lua
@@ -20,7 +20,7 @@ return {
     'bash',
     'c',
     'cpp',
-    'csharp',
+    'cs',
     'css',
     'elixir',
     'go',
@@ -29,7 +29,6 @@ return {
     'java',
     'javascript',
     'javascriptreact',
-    'javascript.jsx',
     'json',
     'kotlin',
     'lua',
@@ -43,7 +42,6 @@ return {
     'swift',
     'typescript',
     'typescriptreact',
-    'typescript.tsx',
     'yaml',
   },
   root_markers = { 'sgconfig.yaml', 'sgconfig.yml' },