fixup! docs: use BFGS with BackTracking for param estimation with PDE…

…s tutorial

docs/pages.jl

@@ -12,7 +12,7 @@ pages = ["index.md",
  "Defining Systems of PDEs" => "tutorials/systems.md",
  "Imposing Constraints" => "tutorials/constraints.md",
  "The symbolic_discretize Interface" => "tutorials/low_level.md",
- "Optimising Parameters (Solving Inverse Problems)" => "tutorials/param_estim.md",
+ "Optimising Parameters (Solving Inverse Problems)" => "tutorials/Aparam_estim.md",
  "Solving Integro Differential Equations" => "tutorials/integro_diff.md",
  "Transfer Learning with Neural Adapter" => "tutorials/neural_adapter.md",
  "The Derivative Neural Network Approximation" => "tutorials/derivative_neural_network.md"],