ci: fix 32-bit linux compilation by reverting setup-fortran gh action to v1.6.1 (#215)

Revert "build(deps): bump fortran-lang/setup-fortran from 1.6.1 to 1.8.1 (#213)"

This reverts commit fd39072.

Author: eparshut

.github/workflows/main.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Checkout sources
       uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
     - name: Setup Fortran compiler
-      uses: fortran-lang/setup-fortran@47809fdb6e637da656ce9ada436527b240c1287f # v1.8.1
+      uses: fortran-lang/setup-fortran@8821f57b53846d35d62632eb51c60ac6c4bff4ce # v1.6.1
       with:
           compiler: intel
     - name: Build C library

.github/workflows/release.yml

@@ -28,7 +28,7 @@ jobs:
       if: runner.os == 'Linux'
       run: sudo apt-get update && sudo apt-get install gcc-multilib
     - name: Setup Fortran compiler
-      uses: fortran-lang/setup-fortran@47809fdb6e637da656ce9ada436527b240c1287f # v1.8.1
+      uses: fortran-lang/setup-fortran@8821f57b53846d35d62632eb51c60ac6c4bff4ce # v1.6.1
       with:
           compiler: intel
     - name: Build C library