Revert "Update to latest upstream tree-sitter release v0.26.0"
This reverts commit dfd28af18250b0f2801ecb4eda538da1bba845e6. Seems emacs currently fails to compile against it:
treesit.c: In function ‘treesit_load_language’: treesit.c:749:42: error: implicit declaration of function ‘ts_language_version’; did you mean ‘ts_language_abi_version’? [-Wimplicit-function-declaration] 749 | make_fixnum (ts_language_version (lang))); | ^~~~~~~~~~~~~~~~~~~ | ts_language_abi_version