RC3 fixes

[svienot]

Description:

This brings a few minor changes:

• update the patch for h5ai-nginx sub-module to:
  • fix initialisation error in the select-contract-form
  • add a patch for the inlined h5ai project to remove the "Open repo in Remix" link
• remove the footer mention "Once a contract is verified it can't be removed..."

Related issue(s):

Fixes #64 #65