A0-4612: Fix update net test from Testnet to main

[Marcin-Radecki]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have added tests
• I have made neccessary updates to the Infrastructure
• I have made corresponding changes to the existing documentation
• I have created new documentation
• I have bumped spec_version and transaction_version
• I have bumped aleph-client version if relevant