Fix version of black to latest

Author: MarcelGeo

.github/workflows/code_style.yml

@@ -9,5 +9,7 @@ jobs:
       - uses: actions/checkout@v2
       - uses: psf/black@stable
         with:
+          # bump this version as needed
+          version: 26.1.0
           options: "--check --diff --verbose -l 120"
-          src: "./mergin"
+          src: "./mergin"