Address doc generation not finding git repo in CI

docs/conf.py

@@ -1,3 +1,4 @@
+import os.path
 from sys import argv
 from dataclasses import asdict
 from sphinxawesome_theme import ThemeOptions
@@ -127,7 +128,7 @@
 highlight_language = 'cpp'
 
 # Provide a short syntax to link to files in the repository
-repo = git.Repo(search_parent_directories=True)
+repo = git.Repo(os.path.abspath(__file__), search_parent_directories=True)
 sha = repo.head.object.hexsha
 extlinks = {
     "gh_file": (f"https://github.com/ethz-asl/wavemap/tree/{sha}/%s", "%s"),