Update CI matrix, set ubuntu version in release workflow to 22.04 if we really want to use Python 3.7

Author: Ickerday

.github/workflows/release.yml

@@ -6,7 +6,8 @@ on:
 jobs:
   publish:
     name: Deploy Release to PyPI
-    runs-on: ubuntu-latest
+    # Ubuntu 22.04 is the last version with Python 3.7 binaries available
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout source
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493

.github/workflows/test.yml

@@ -1,32 +1,20 @@
 name: Python CI
-
 on: [push, workflow_dispatch]
 
 jobs:
   build:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
-        os:
-          - ubuntu-latest
-        python: [3.9, 3.13]
-        splunk-version:
-          - "8.1"
-          - "8.2"
-          - "latest"
+        os: [ubuntu-latest]
+        python-version: [3.9, 3.13]
+        splunk-version: [9.4, latest]
         include:
+          # Ubuntu 22.04 is the last version with Python 3.7 binaries available
           - os: ubuntu-22.04
-            python: 3.7
-            splunk-version: "8.1"
-          - os: ubuntu-22.04
-            python: 3.7
-            splunk-version: "8.2"
-          - os: ubuntu-22.04
-            python: 3.7
-            splunk-version: "latest"
-
-      fail-fast: false
-
+            python-version: 3.7
+            splunk-version: 9.1
     steps:
       - name: Checkout code
         uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493