Retroactively sing-off Goncalo's commits

[yshyn-iohk]

@goncalo-frade-iohk, the commit with the following text should be added to the main branch of the repo:

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I, goncalo-frade-iohk, retroactively sign off on these commits:
commit a367792 fix: update swift sdk docs url (#78)
commit 66fae41 feat: tutorial issue credential cloud agent issuer to edge agent holder (#54)
commit 21207c0 feat: update main page sdk components (#46)
commit 900c57d feat: update submodules documentation to latest

Signed-off-by: goncalo-frade-iohk goncalo.frade@iohk.io

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