website: Temporary link to the beta1 announcement from v0.12 guide
website: Temporary link to the beta1 announcement from v0.12 guide

The announcement post contains the information about the temporary
situation where not all of the providers are compatible yet. Linking there
rather than duplicating the information in the upgrade guide means we'll
be able to update in one place as the situation changes.

tommynsong/terraform,ewbankkit/terraform,luis-silva/terraform,pryorda/terraform,tommynsong/terraform,hashicorp/terraform,pradeepbhadani/terraform,heimweh/terraform,apparentlymart/terraform,VladRassokhin/terraform,hashicorp/terraform,ewbankkit/terraform,brandontosch/terraform,brandontosch/terraform,tommynsong/terraform,drebes/terraform,pdecat/terraform,luis-silva/terraform,heimweh/terraform,gechr/terraform,hashicorp/terraform,VladRassokhin/terraform,apparentlymart/terraform,pradeepbhadani/terraform,nlamirault/terraform,heimweh/terraform,pdecat/terraform,apparentlymart/terraform,heimweh/terraform,rnaveiras/terraform,pradeepbhadani/terraform,VladRassokhin/terraform,nlamirault/terraform,ewbankkit/terraform,rnaveiras/terraform,luis-silva/terraform,drebes/terraform,drebes/terraform,drebes/terraform,brandontosch/terraform,apparentlymart/terraform,heimweh/terraform,pdecat/terraform,pryorda/terraform,brandontosch/terraform,pryorda/terraform,apparentlymart/terraform,luis-silva/terraform,rnaveiras/terraform,ewbankkit/terraform,gechr/terraform,nlamirault/terraform,VladRassokhin/terraform,brandontosch/terraform,gechr/terraform,pdecat/terraform