ci: Python setup tweak

.github/workflows/book.yml

@@ -16,9 +16,9 @@ jobs:
                 fetch-depth: 0
 
             - name: Install Python
-              uses: actions/setup-python@v1
+              uses: actions/setup-python@v5
               with:
-                python-version: 3.9
+                python-version: 3.13
 
             - name: Install Rust
               uses: actions-rs/toolchain@v1

.github/workflows/ci.yml

@@ -20,7 +20,7 @@ jobs:
           toolchain: stable
           target: wasm32-unknown-unknown
           override: true
-      - uses: actions/setup-python@v1
+      - uses: actions/setup-python@v5
         with:
           python-version: '3.13'