gh: Configure VAST before building docs.

Author: Jezurko

.github/workflows/prerelease.yml

@@ -304,6 +304,9 @@ jobs:
           submodules: true
           fetch-depth: 1
 
+      - name: Configure build
+        run: cmake --preset ci
+
       - name: Build VAST Doc
         run: cmake --build --preset ci-release --target vast-doc