Bump bundle/syntax-elixir from 39cfaec to 1ec9aab

Bumps [bundle/syntax-elixir](https://github.com/elixir-editors/vim-elixir) from `39cfaec` to `1ec9aab`.
- [Commits](elixir-editors/vim-elixir@39cfaec...1ec9aab)

---
updated-dependencies:
- dependency-name: bundle/syntax-elixir
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]