ci: run python 3.7 on ubuntu 22.04

Author: HansBug

.github/workflows/python-compat.yml

@@ -6,19 +6,27 @@ on:
 
 jobs:
   smoke:
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version:
-          - "3.7"
-          - "3.8"
-          - "3.9"
-          - "3.10"
-          - "3.11"
-          - "3.12"
-          - "3.13"
-          - "3.14"
+        include:
+          - python-version: "3.7"
+            runner: ubuntu-22.04
+          - python-version: "3.8"
+            runner: ubuntu-latest
+          - python-version: "3.9"
+            runner: ubuntu-latest
+          - python-version: "3.10"
+            runner: ubuntu-latest
+          - python-version: "3.11"
+            runner: ubuntu-latest
+          - python-version: "3.12"
+            runner: ubuntu-latest
+          - python-version: "3.13"
+            runner: ubuntu-latest
+          - python-version: "3.14"
+            runner: ubuntu-latest
+    runs-on: ${{ matrix.runner }}
 
     steps:
       - uses: actions/checkout@v4