Merge pull request #921 from JanLahmann/patch-1

fix two broken links/URLs

start_here.ipynb

@@ -70,7 +70,7 @@
     "6. [Extended stabilizer tutorial](tutorials/simulators/6_extended_stabilizer_tutorial.ipynb) - Gives an overview of the *extended stabilizer* Qasm Simulator method\n",
     "\n",
     "\n",
-    "7. [Matrix Product State simulator](tutorials/simulations/7_matrix_product_state_method.ipynb) - Gives an overview of the *matrix product state* Simulator method\n",
+    "7. [Matrix Product State simulator](tutorials/simulators/7_matrix_product_state_method.ipynb) - Gives an overview of the *matrix product state* Simulator method\n",
     "\n",
     "\n",
     "##  Quantum Device Noise Analysis\n",
@@ -106,7 +106,7 @@
     "2. [Quadratic Program Converters](tutorials/optimization/2_converters_for_quadratic_programs.ipynb) - Qiskit Optimization provides with `QuadraticProgram` a very generic and powerful representation for optimization problems\n",
     "\n",
     "\n",
-    "3. [Minimum Eigen Optimizer](tutorials/optimization/3_minimum_eigen_optimizer) - Solutions to quadratic programs using minimum eigenvalue solvers.\n",
+    "3. [Minimum Eigen Optimizer](tutorials/optimization/3_minimum_eigen_optimizer.ipynb) - Solutions to quadratic programs using minimum eigenvalue solvers.\n",
     "\n",
     "\n",
     "4. [Grover Optimizer](tutorials/optimization/4_grover_optimizer.ipynb) - Explore each component of the `GroverOptimizer`, which utilizes the techniques described in GAS, by minimizing a Quadratic Unconstrained Binary Optimization (QUBO) problem\n",