longer commit string

Reviewed-by: tischrei <tino.schreiber@t-systems.com>
Co-authored-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-committed-by: Gode, Sebastian <sebastian.gode@t-systems.com>

otc_metadata/templates/conf.py.j2

@@ -134,8 +134,8 @@ latex_documents = [
 {% endif -%}
 ]
 
-# Get the Git commit values
+# Get the Git commit values for last updated timestamp on each page
 repo = Repo(search_parent_directories=True)
 commit = repo.head.commit
-current_commit_hash = commit.hexsha[:7]
+current_commit_hash = commit.hexsha
 current_commit_time = commit.committed_datetime.strftime('%Y-%m-%d %H:%M')