Fix incorrect dir path in meson doc gen

Author: ankith26

meson.build

@@ -365,7 +365,7 @@ subdir('src_py')
 
 if not get_option('stripped')
     # run make_docs and make docs
-    if not fs.is_dir('generated')
+    if not fs.is_dir('docs/generated')
         make_docs = files('buildconfig/make_docs.py')
         res = run_command(
             [find_program('python3', 'python'), make_docs],