Do not use shallow clones in Read the Docs to properly show last upda…

…ted time (#2157)

.readthedocs.yaml

@@ -13,6 +13,9 @@ build:
     # nodejs: "20"
     # rust: "1.70"
     # golang: "1.20"
+  jobs:
+    post_checkout:
+      - git fetch --unshallow || true
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx: