How can i replace ruby tree sitter syntax with crystal's one?

[AQMpolyface]

ok i need to recompile helix from source but i get this error:

error: failed to run custom build command for `helix-term v25.1.1 (/home/polyface/git/helix/helix-term)`

Caused by:
  process didn't exit successfully: `/home/polyface/git/helix/target/release/build/helix-term-bf1426783444cb5a/build-script-build` (exit status: 101)
  --- stdout
  Fetching 242 grammars
  241 up to date git grammars
  Failure 1/1: crystal Git command failed.
  Stdout: 
  Stderr: fatal: couldn't find remote ref 76afc1f


  --- stderr
  thread 'main' panicked at helix-term/build.rs:5:26:
  Failed to fetch tree-sitter grammars: 1 grammars failed to fetch
  note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
warning: build failed, waiting for other jobs to finish...
``

this is what ive put in the languages.toml:
```toml
[[grammar]]
name = "crystal"
source = { git = "https://github.com/crystal-lang-tools/tree-sitter-crystal", rev = "76afc1f53518a2b68b51a5abcde01d268a9cb47c" }

with the latest commit. i tried replacing it with main but i get the exact same error:

error: failed to run custom build command for `helix-term v25.1.1 (/home/polyface/git/helix/helix-term)`

Caused by:
  process didn't exit successfully: `/home/polyface/git/helix/target/release/build/helix-term-bf1426783444cb5a/build-script-build` (exit status: 101)
  --- stdout
  Fetching 242 grammars
  241 up to date git grammars
  Failure 1/1: crystal Git command failed.
  Stdout: 
  Stderr: fatal: couldn't find remote ref 76afc1f


  --- stderr
  thread 'main' panicked at helix-term/build.rs:5:26:
  Failed to fetch tree-sitter grammars: 1 grammars failed to fetch

So what do i need to put in the ref to make it work? thanks

I am trying to do that because crystal uses the ruby tree sitter syntax now which is similar but is a little weird

[AQMpolyface]

ok i forked the tree sitter and copy and pasted a bunch of git command from chatgpt and got it to work