modified: expansion of python versions

Author: kamome1201

.github/workflows/csubst-ci.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['3.9', '3.10', '3.11', '3.12']
         install: [source]   # bioconda は後で復活可
 
     steps: