Update lambda1/lambda2 to git version 2.29.0

Update lambda1/lambda2 to git version 2.28.0

Update lambda1/lambda2 to git version 2.26.2

Update lambda1/lambda2 to git version 2.26.1

Update lambda1/lambda2 to git version 2.25.0

Update lambda1/lambda2 to git version 2.24.1

Update lambda2 to git version 2.24.0

Add Amazon Linux 2 layer to README

Remove old 2.21.0 link from README

Update to git version 2.20.0