Fix doc build

Author: unkcpz

conf.py

@@ -3,7 +3,12 @@
 project = html_title = "AiiDA Enhancement Proposals"
 author = "The AiiDA team"
 
-extensions = ["myst_parser", "sphinx_external_toc"]
+extensions = [
+    "myst_parser", 
+    "sphinx_external_toc", 
+    "anchors"
+]
+
 exclude_patterns = [".github", ".tox", ".vscode", "_build"]
 external_toc_exclude_missing = True
 html_theme = "furo"