MAINT: PR 830 revisions

* use Ubuntu 22.04 LTS for Python 3.10
testing to avoid mysterious issues
described in gh-851

Author: tylerjereddy

.github/workflows/main_ci.yml

@@ -22,6 +22,13 @@ jobs:
         platform: [ubuntu-latest,
                    macos-latest]
         python-version: ["3.6", "3.7", "3.8", "3.9", "3.10", "3.11"]
+        # see gh-851
+        exclude:
+          - platform: ubuntu-latest
+            python-version: "3.10"
+        include:
+          - platform: ubuntu-22.04
+            python-version: "3.10"
     runs-on: ${{ matrix.platform }}
     steps:
       - uses: actions/checkout@v3