Update missed audit-build switch to 0.80.0 as a target

Signed-off-by: Daniel F. Dickinson <dfdpublic@wildtechgarden.ca>

Author: danielfdickinson

.github/workflows/build-and-verify.yml

@@ -31,7 +31,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        hugo: ["0.81.0", "0.88.1", "latest"]
+        hugo: ["0.80.0", "0.88.1", "0.96.0", "latest"]
     steps:
       - name: "Build Site with Hugo and Audit"
         uses: danielfdickinson/build-audit-action-hugo-dfd@main