Update ALTCHA flow criteria to include additional conditions for redi…

[GabrielAzion]

…rect

Related issue: EDU-6922

The ${uri} criteria variable has been inserted at Step 6 in the "Setting up the redirect in Application" section now reads:

6. In the **Criteria** section, configure the following conditions:
   - **Variable**: `${http_X_Azcaptcha_Success}`
   - **Operator**: `does not exist`
   - **Variable**: `${uri}`
   - **Operator**: `is equal`
   - **Value**: `/form`

Both PT-BR and EN versions of the ALTCHA guide are now in sync with the same two-condition criteria block.