Bump GAMS CI version to latest available

Author: glatterf42

.github/workflows/conda.yaml

@@ -11,8 +11,8 @@ on:
   #   branches: [ main ]
 
 env:
-  # First version including a macOS arm64 distribution
-  GAMS_VERSION: 43.4.1
+  # Oldest version that can reliably be downloaded
+  GAMS_VERSION: 48.6.1
 
 jobs:
   conda:

.github/workflows/nightly.yaml

@@ -21,8 +21,8 @@ env:
   depth: 100  # See description in pytest.yaml
   # Version used until 2024-11-20; disabled
   # gams-version: 29.1.0
-  # First version including a macOS arm64 distribution
-  gams-version: 43.4.1
+  # Oldest version that can reliably be downloaded
+  gams-version: 48.6.1
   os: ubuntu-latest
   python-version: "3.13"
 

.github/workflows/pytest.yaml

@@ -21,7 +21,7 @@ defaults:
     shell: bash
 
 env:
-  GAMS_VERSION: 48.6.1 # Oldest version of GAMS that one can download
+  GAMS_VERSION: 48.6.1 # Oldest version of GAMS that can reliably be downloaded
   depth: 100  # Must be large enough to include the most recent release
   label: "safe to test"  # Label that must be applied to run on PRs from forks
   python-version: "3.13"  # For non-matrixed jobs