CompatHelper: bump compat for LinearSolve to 3 for package docs, (keep existing compat) (#545)

Co-authored-by: CompatHelper Julia <[email protected]>

Author: github-actions[bot]

docs/Project.toml

@@ -43,7 +43,7 @@ DocumenterCitations = "1"
 DocumenterInterLinks = "1.0.0"
 IncompleteLU = "0.2"
 InteractiveUtils = "<0.0.1, 1"
-LinearSolve = "2"
+LinearSolve = "2, 3"
 NonlinearSolve = "4"
 NonlinearSolveBase = "1"
 NonlinearSolveFirstOrder = "1"