removed space in branch value for Cargo.toml

[uros-5]

Little space in branch value caused error while trying to include this repository as dependency.
Error:

Caused by
  failed to load source for dependency `tree-sitter-jinja2`
Caused by
  Unable to update ssh://git@github.com/dbt-labs/tree-sitter-jinja2?branch= main
Caused by
  '+refs/heads/ main:refs/remotes/origin/ main' is not a valid refspec.; class=Invalid (3)

Description

Checklist

• I have read the contributing guide and understand what's expected of me
• I have signed the CLA
• I have run this code in development and it appears to resolve the stated issue