Replace `.Site.Social` and `.Site.IsMultiLingual`

[nodeg]

3:37:42 PM: hugo v0.139.3-2f6864387cd31b975914e8373d4bf38bddbd47bc+extended linux/amd64 BuildDate=2024-11-29T15:36:56Z VendorInfo=gohugoio
3:37:42 PM: ERROR deprecated: .Site.Social was deprecated in Hugo v0.124.0 and will be removed in Hugo 0.140.0. Implement taxonomy 'social' or use .Site.Params.Social instead.
3:37:42 PM: ERROR deprecated: .Site.IsMultiLingual was deprecated in Hugo v0.124.0 and will be removed in Hugo 0.140.0. Use hugo.IsMultilingual instead.