config: increase http.postBuffer to 500MB

Support git lfs
https://stackoverflow.com/questions/6842687/the-remote-end-hung-up-unexpectedly-while-git-cloning

scripts/git.sh

@@ -32,6 +32,7 @@ git config --global diff.algorithm histogram
 git config --global diff.colorMoved no
 git config --global diff.submodule log
 git config --global fetch.prune true
+git config --global http.postBuffer 500000000
 git config --global init.defaultBranch main
 git config --global log.date iso
 git config --global merge.conflictstyle zdiff3