Edit commit author's Name / Email on Github

update_author.sh

#!/bin/sh

REPO_NAME="your_repo_name"

git clone --bare "git@github.com:<username>/$REPO_NAME"
cd "$REPO_NAME"

git filter-branch --env-filter '
OLD_NAME="Name You want to change"
CORRECT_NAME="Name you want to replace by"
CORRECT_EMAIL="Email you want to replace by"

if [ "$GIT_COMMITTER_NAME" = "$OLD_NAME" ]
then
    export GIT_COMMITTER_NAME="$CORRECT_NAME"
    export GIT_COMMITTER_EMAIL="$CORRECT_EMAIL"
fi
if [ "$GIT_AUTHOR_NAME" = "$OLD_NAME" ] #
then
    export GIT_AUTHOR_NAME="$CORRECT_NAME"
    export GIT_AUTHOR_EMAIL="$CORRECT_EMAIL"
fi
' --tag-name-filter cat -- --branches --tags

git push --force --tags origin 'refs/heads/*'
cd ..
rm -rf "$REPO_NAME"

This example shows how to edit your author info based on "COMMITTER_NAME" and "AUTHOR_NAME".
You can also use "COMMITTER_EMAIL" and "AUTHOR_EMAIL" if needed.