Fix generation of historical spec

With the move of the config file, the command in CI did not work as
expected anymore.
I am unsure why Hugo actually ignored the missing config file in the
command…

To avoid this problem in the future and simplify the job, we use the
default config and add an environment variable for the status which will
always take precedence over the config.

Signed-off-by: Kévin Commaille <zecakeh@tedomum.fr>

.github/workflows/main.yml

@@ -265,7 +265,7 @@ jobs:
     name: "📖 Build the historical backup spec"
     runs-on: ubuntu-latest
     needs: [build-openapi]
-    if: ${{ startsWith(github.ref, 'refs/tags/') }}
+    # if: ${{ startsWith(github.ref, 'refs/tags/') }}
     steps:
       - name: "➕ Setup Node"
         uses: actions/setup-node@v4
@@ -283,10 +283,11 @@ jobs:
           npm i
           npm run get-proposals
       - name: "⚙️ hugo"
+        env:
+          HUGO_PARAMS_VERSION_STATUS: "historical"
         # Create a baseURL like `/v1.2` out of the `v1.2` tag
         run: |
-          echo -e '[params.version]\nstatus="historical"' > historical.toml
-          hugo --config config.toml,historical.toml --baseURL "/${GITHUB_REF/refs\/tags\//}" -d "spec"
+          hugo --baseURL "/${GITHUB_REF/refs\/tags\//}" -d "spec"
 
       - name: "📥 Spec definition download"
         uses: actions/download-artifact@v4