CI: Bump deprecated macOS 13 runner to macOS 15

.github/workflows/tests.yml

@@ -153,8 +153,8 @@ jobs:
 
   macos:
     name: macos ${{ matrix.tox_env }}
-    # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
+    # https://github.com/actions/runner-images/blob/main/images/macos/macos-15-Readme.md
-    runs-on: macos-13
+    runs-on: macos-15
     timeout-minutes: 15
 
     strategy:

docs/changelog.rst

@@ -22,6 +22,7 @@ In progress (unreleased)
 ------------------------
 
 * :gh:issue:`1118` CI: Use 2025.02 test images, keeping same OS releases
+* :gh:issue:`1358` CI: Bump deprecated macOS 13 runner to macOS 15
 
 
 v0.3.33 (2025-11-22)