Fix "dubious ownership in repository" error with git 2.35.2 and later

Author: dgburr

generator/sbpg/targets/latex.py

@@ -354,6 +354,9 @@ def render_source(output_dir, package_specs, version: ReleaseVersion):
   os.chdir(output_dir)
   if "TEXMFVAR" not in os.environ:
     os.environ["TEXMFVAR"] = "/tmp"
+  # fix "dubious ownership in repository" error with git 2.35.2 and later
+  subprocess.check_call(["git", "config", "--global", "--add",
+                         "safe-directory", ".."])
   subprocess.check_call(["pdflatex", "--enable-write18",
                          "-shell-escape", "sbp_out.tex"])
   subprocess.check_call(["mv", "sbp_out.pdf", "../docs/sbp.pdf"])