Bump tree-sitter to 0.26.8 (#276)

Author: aspeddro

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Set up tree-sitter
         uses: tree-sitter/setup-action/cli@v2
         with:
-          tree-sitter-ref: v0.26.3
+          tree-sitter-ref: v0.26.8
 
       - name: Run tests
         uses: tree-sitter/parser-test-action@v2