ci(wheels): coerce "install python" step to use python 3.9

This is just to silence warnings in the workflow summary view. It shouldn't affect anything about the builds themselves.

Signed-off-by: Zach Lewis <[email protected]>

Author: zachlewis

.github/workflows/wheel.yml

@@ -124,6 +124,8 @@ jobs:
 
       - name: Install Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        with:
+          python-version: '3.9'
 
       - name: ccache-restore
         id: ccache-restore
@@ -228,7 +230,9 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Install Python
-        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.
+        with:
+          python-version: '3.9'
 
       - name: ccache-restore
         id: ccache-restore
@@ -323,6 +327,8 @@ jobs:
 
       - name: Install Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        with:
+          python-version: 3.9
 
       - name: ccache-restore
         id: ccache-restore
@@ -410,6 +416,8 @@ jobs:
 
       - name: Install Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        with:
+          python-version: 3.9
 
       - name: ccache-restore
         id: ccache-restore
@@ -488,6 +496,8 @@ jobs:
 
       - name: Install Python
         uses: actions/setup-python@f677139bbe7f9c59b41e40162b753c062f5d49a3 # v5.2.0
+        with:
+          python-version: 3.9
 
       - name: Build wheels
         uses: pypa/cibuildwheel@9c00cb4f6b517705a3794b22395aedc36257242c # v3.2.1