ci: pin python-version we use to generate the published spec

Some dependencies we need do not yet have wheels available for Python 3.11
which is installed by the '3.x' version selector.

Signed-off-by: Joshua Lock <jlock@vmware.com>

Author: joshuagl

.github/workflows/draft.yml

@@ -12,7 +12,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@b55428b1882923874294fa556849718a1d7f2ca5
       with:
-        python-version: 3.x
+        python-version: '3.10'
         cache: pip
 
     - name: Clone

.github/workflows/pr.yml

@@ -16,7 +16,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@b55428b1882923874294fa556849718a1d7f2ca5
         with:
-          python-version: 3.x
+          python-version: '3.10'
           cache: pip
 
       - name: Ensure changes build

.github/workflows/release.yml

@@ -17,7 +17,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@b55428b1882923874294fa556849718a1d7f2ca5
       with:
-        python-version: 3.x
+        python-version: '3.10'
         cache: 'pip'
 
     - name: Get previous version