Apply suggestions from code review

Add back `must-revalidate`

Co-authored-by: Andrey Talman <[email protected]>

Author: edmorley

s3_management/manage.py

@@ -426,7 +426,7 @@ def upload_libtorch_html(self) -> None:
                     key=f"{subdir}/{self.html_name}"
                 ).put(
                     ACL='public-read',
-                    CacheControl='max-age=600, public',
+                    CacheControl='max-age=600, public, must-revalidate',
                     ContentType='text/html',
                     Body=index_html
                 )
@@ -440,7 +440,7 @@ def upload_pep503_htmls(self) -> None:
                     key=f"{subdir}/index.html"
                 ).put(
                     ACL='public-read',
-                    CacheControl='max-age=600, public',
+                    CacheControl='max-age=600, public, must-revalidate',
                     ContentType='text/html',
                     Body=index_html
                 )
@@ -453,7 +453,7 @@ def upload_pep503_htmls(self) -> None:
                         key=f"{subdir}/{compat_pkg_name}/index.html"
                     ).put(
                         ACL='public-read',
-                        CacheControl='max-age=600, public',
+                        CacheControl='max-age=600, public, must-revalidate',
                         ContentType='text/html',
                         Body=index_html
                     )