Update docs/src/tutorials/linear.md

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: ChrisRackauckas

docs/src/tutorials/linear.md

@@ -81,6 +81,7 @@ LinearSolve.jl specifically tests with the following cases:
   - [Metal.jl](https://metal.juliagpu.org/stable/) (Apple M-series GPU-based dense matrices) `MetalArray`
 
 !!! note
+    
 
 Choosing the most specific matrix structure that matches your specific system will give you the most performance.
 Thus if your matrix is symmetric, specifically building with `Symmetric(A)` will be faster than simply using `A`,