Updating CHANGELOG.md for v3.2.0
Updating CHANGELOG.md for v3.2.0

Co-authored-by: Ramon Rüttimann <2bfe2630cd649d2b7fecaff845d0a28fb600f4a0@nine.ch>

hashicorp/terraform-provider-random,terraform-providers/terraform-provider-random,terraform-providers/terraform-provider-random,hashicorp/terraform-provider-random