Point to Ghaf SBOM page in scs.html

[ktusawrk]

In the page https://tiiuae.github.io/ghaf/scs/scs.html
in the second paragraph under the illustration, there is a link

• Link text: software bill of materials (SBOM)
• Link URL: https://fossa.com/blog/software-bill-of-materials-formats-use-cases-tools/

Now that we have a dedicated Software Bill of Materials page in Ghaf GitHub pages, we should be pointing to it
-> Replace link URL with: https://tiiuae.github.io/ghaf/scs/sbom.html

Note: in https://tiiuae.github.io/ghaf/scs/sbom.html there is a link also to Fossa page so no information is lost.

[jenninikko]

I added the term to the glossary #72