to update modules use the following as all except bootsrap dont use the go versioning (v1.0.0)

hugo mod get -u github.com/twbs/icons (version doesnt need to be specified )

hugo mod get -u github.com/FortAwesome/Font-Awesome@d79d85c (5.15.3 2021-4-28)

hugo mod get -u github.com/simple-icons/simple-icons@01aa121 (4.21.0 2021-4-28)

hugo mod get -u github.com/feathericons/feather should work else >> @9e0dcca (4.28.0 2021-4-28)