ci: Re-work env checkout for uv in CI

Author: seandstewart

.github/actions/bootstrap-environ/action.yml

@@ -7,10 +7,6 @@ inputs:
   runner:
     description: The Runner to build your environment on.
 
-env:
-  # Configure a relative location for the uv cache
-  UV_CACHE_DIR: ~/.cache/uv
-
 runs:
   using: composite
   steps:
@@ -20,6 +16,12 @@ runs:
       git config pull.ff true
     shell: bash
   - uses: astral-sh/setup-uv@v5
+    env:
+      # Configure a relative location for the uv cache
+      UV_CACHE_DIR: ~/.cache/uv
+    with:
+      python-version: ${{ matrix.python-version }}
+  - uses: actions/setup-python@v5
     with:
       python-version: ${{ inputs.python-version }}
   - uses: actions/cache@v4

.github/workflows/docs.yml

@@ -23,7 +23,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        python-version: [ "3.x" ]
+        python-version: [ "3.12" ]
     steps:
     - uses: actions/create-github-app-token@v1
       id: app-token