fixup: setup fortran-env in hopes to fix failing macos tests

Author: gnikit

.github/workflows/test-workflow.yml

@@ -41,6 +41,13 @@ jobs:
         with:
           repository: fortran-lang/fpm
 
+      - name: Setup the Fortran compiler
+        if: matrix.fpm-version == 'latest'
+        uses: fortran-lang/[email protected]
+        with:
+          compiler: gcc
+          compiler-version: 13
+
       - name: Check that all the fpm tests pass
         if: matrix.fpm-version == 'latest'
         run: fpm test