add autosectionlabel

Signed-off-by: nstarman <nstarman@users.noreply.github.com>

Author: nstarman

sphinx_astropy/conf/v1.py

@@ -194,6 +194,7 @@ def check_sphinx_version(expected_version):
 # ones.
 extensions = [
     'sphinx.ext.autodoc',
+    "sphinx.ext.autosectionlabel",
     'sphinx.ext.coverage',
     'sphinx.ext.inheritance_diagram',
     'sphinx.ext.intersphinx',