cfnspec: Broken link in L1 resource documentation

### Describe the issue

# What
There is a broken link labelled "Sharing with IAM roles and users" linking to "https://ram/latest/userguide/permissions.html#permissions-rbp-supported-resource-types" on the ram documentation page https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ram.CfnResourceShare.html.

# Other considerations
Considering this seems like this could be a more common issue considering a very similar issue was found with another CFN sourced link was opened earlier [here](https://github.com/aws/aws-cdk/issues/24054) it might be worth re raising this a wider ticket to check all the documentation derived from the CF docs to check for and then fix dead links due to double slashes (//) being in the URL or other reasons :thinking:

### Links

https://docs.aws.amazon.com/cdk/api/v2/docs/aws-cdk-lib.aws_ram.CfnResourceShare.html

Open the linked CfnResourceShare documentation page and verify the broken “Sharing with IAM roles and users” URL. Compare it with issue #24054 to understand the related generated-link problem, then identify the documentation source responsible for this link. Done means the link resolves correctly and any broader scope is explicitly defined.

Written by the indexing model from the issue text.