Fix extremely silly typo

Author: clin1234

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        py: ["3.14=dev", "3.14t-dev", "3.13", "3.13t", "3.12", "3.11", "3.10", "3.9", "3.8"]
+        py: ["3.14-dev", "3.14t-dev", "3.13", "3.13t", "3.12", "3.11", "3.10", "3.9", "3.8"]
 
     runs-on: ${{ matrix.os }}
     name: Run test with Python ${{ matrix.py }} on ${{ matrix.os }}