Ensure docs repos are on main branch after clone

Author: Andrej730

.github/workflows/bonsai-docs.yml

@@ -21,6 +21,7 @@ jobs:
           git config --global user.name 'IfcOpenBot'
           git config --global user.email 'IfcOpenBot@users.noreply.github.com'
           git clone https://${{ secrets.GH_APIKEY }}@github.com/IfcOpenShell/bonsaibim_org_docs
+          git -C bonsaibim_org_docs checkout -B main
           # Delete old content but preserve CNAME for GitHub Pages
           find bonsaibim_org_docs -mindepth 1 -not -name "CNAME" -delete
           cp -r _build/html/* bonsaibim_org_docs/

.github/workflows/ifcopenshell-docs.yml

@@ -22,6 +22,7 @@ jobs:
           git config --global user.name 'IfcOpenBot'
           git config --global user.email 'IfcOpenBot@users.noreply.github.com'
           git clone https://${{ secrets.GH_APIKEY }}@github.com/IfcOpenShell/ifcopenshell_org_docs
+          git -C ifcopenshell_org_docs checkout -B main
           # Delete old content but preserve CNAME for GitHub Pages
           find ifcopenshell_org_docs -mindepth 1 -not -name "CNAME" -delete
           cp -r _build/html/* ifcopenshell_org_docs/