Chore/sync activity content spec/1

[mehtaishita]

Problem

Make changes to address inconsistencies between ActivityContent package and Spec

https://github.com/LibertyDSNP/activity-content/issues/1

Solution

Making changes to the Activity Content portion of the spec to better clarify required values and parameter names

Change summary:

• [x] Tidy, well formulated change
• [x] Rename URL properties for Associated types
• [x] Update respective examples to match
• [x] Amended Associated Type: Hash example

Steps to Verify:

1. Build spec
2. Verify changes are consistent across various attachment types - Audio, Video, Image

[mehtaishita]

From description of the ticket:

For ActvityContentHash - in spec value is required. In SDK we have dynamic values for key. - go with spec

For ActivityContentLocation - spec says name is required - SDK has name optional - so need to resolve - required

Both of these are required in the sdk so there are no changes to make there.

In the description, we also decided to not pluralize parameter names, so I have not renamed Video Link: Hash to Hashes. Please verify that decision

[mehtaishita]

As in change the variable names in activity-content to href?

[wilwade]

As in change the variable names in activity-content to href?

Right. The spec is correct, the code in activity content is wrong.

[mehtaishita]

I have reverted the renaming parameters for Associated Attachment types