sort append by file name (guideline number)

Author: PhilippSalvisberg

tools/run-in-container/genappendix.sh

@@ -10,4 +10,4 @@ echo "" >> $OUTFILE
 cat docs/_appendixdata/appendix_a.md.template >> $OUTFILE
 cat docs/_appendixdata/appendix_b.md.template >> $OUTFILE
 
-find docs/4-language-usage/ -name g-*.md | xargs head -n 4 -q | tools/run-in-container/genappendix_b_table.awk >> $OUTFILE
+find docs/4-language-usage/ -name g-*.md | sort | xargs head -n 4 -q | tools/run-in-container/genappendix_b_table.awk >> $OUTFILE