Added upload artifact

.gitea/workflows/build_pdf.yaml

@@ -10,9 +10,14 @@ jobs:
       - name: Check out repository code
         uses: actions/checkout@v4
       - run: echo "The ${{ gitea.repository }} repository has been cloned to the runner."
-      - run: echo "Starting LaTeX build"
+      - run: echo "Starting first LaTeX build"
       - run: pdflatex fat.tex
-      #- name: List files in the repository
-      #  run: |
-      #    ls ${{ gitea.workspace }}
+      - run: echo "Starting second LaTeX build"
+      - run: pdflatex fat.tex
+        uses: actions/upload-artifact@v4
+        with:
+          name: fat.pdf
+          path: fat.pdf
+          overwrite: true
+          if-no-files-found: error
       - run: echo "This job's status is ${{ job.status }}."