workflows: Drop obsolete git safe.directory configuration

`actions/checkout@v4` does this by default.

Author: martinpitt

.github/workflows/release.yml

@@ -14,10 +14,6 @@ jobs:
           # need this to also fetch tags
           fetch-depth: 0
 
-      # https://github.blog/2022-04-12-git-security-vulnerability-announced/
-      - name: Pacify git's permission check
-        run: git config --global --add safe.directory /__w
-
       - name: Workaround for https://github.com/actions/checkout/pull/697
         run: git fetch --force origin $(git describe --tags):refs/tags/$(git describe --tags)