Run fewer runs at once.

When we get more than this, the URLs we spam complain and fail.  Hopefully only running 13 at once will actually fix this.

.github/workflows/fix-ci.yml

@@ -9,7 +9,7 @@ jobs:
     name: Fix the entries of BioModels and commit to the repository
     strategy:
       matrix:
-        job: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19]
+        job: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
       fail-fast: false
     runs-on: ubuntu-latest
     steps:
@@ -74,7 +74,7 @@ jobs:
         run: python -m pip install -r requirements.txt
 
       - name: Fix entries
-        run: python fix-entries.py --convert-files --validate-sbml --num-jobs 20 --job ${{ matrix.job }}
+        run: python fix-entries.py --convert-files --validate-sbml --num-jobs 13 --job ${{ matrix.job }}
 
       - name: Setup Git
         run: |