remove poetry 1.5 from testing

Author: jvllmr

.github/workflows/main.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: true
       matrix:
         python-version: [3.8, 3.9, "3.10", "3.11"]
-        poetry-version: [1.5.1, 1.6.1]
+        poetry-version: [1.6.1]
         os: [ubuntu-latest, macos-latest]
     steps:
       - uses: actions/checkout@v3