Code Scanning can accept multiple uploads for the same tool and uses the concept of category to keep results separated.
If not provided explicitly, the category is computed based on a few parameters like workflow path and matrix variables. The implicit computation of the category can create confusion if users change their workflow, as we start considering the new analyses as unrelated to existing results.
By making the category explicit in the workflow we hope to make the concept more prominent and reduce accidental changes.
Line 51 added the query packs by default but commented.
Lines 62-63: added better instructions
Lines 68-70 added an example which provides better detail
Robin Neatherway