CI: use newer pillow in tests

Author: bsipocz

.github/workflows/tests.yml

@@ -22,42 +22,41 @@ jobs:
         python-version: ["3.11", "3.12", "3.13", "3.14"]
         sphinx: [""]  # Newest Sphinx
         myst-parser: [""]  # Newest MyST Parser (any)
-        pillow: ["==11.0.0"]
         include:
           # Just check the other platforms once
           - os: windows-latest
             python-version: "3.13"
             sphinx: "~=8.0"
             myst-parser: "~=4.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
           - os: macos-latest
             python-version: "3.13"
             sphinx: "~=8.0"
             myst-parser: "~=4.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
           - os: ubuntu-latest
             python-version: "3.13"
             sphinx: "~=8.0"
             myst-parser: "~=4.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
           # Oldest known-compatible dependencies
           - os: ubuntu-latest
             python-version: "3.10"
             sphinx: "==5.0.0"
             myst-parser: "==1.0.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
           # Mid-range dependencies
           - os: ubuntu-latest
             python-version: "3.11"
             sphinx: "==7.0.0"
             myst-parser: "==3.0.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
           # Newest known-compatible dependencies
           - os: ubuntu-latest
             python-version: "3.14"
             sphinx: "~=9.0"
             myst-parser: "~=5.0"
-            pillow: "==11.0.0"
+            pillow: "==12.0.0"
 
     runs-on: ${{ matrix.os }}