Add missing frontmatter for water-hammer and partitioned-pipe-multiscale

Author: MakisH

partitioned-pipe-multiscale/README.md

@@ -1,5 +1,6 @@
 ---
-title: Partitioned Pipe — Geometric Axial Multiscale
+title: Partitioned pipe — Geometric multiscale
+permalink: tutorials-partitioned-pipe-multiscale.html
 keywords: OpenFOAM, Nutils, preCICE, geometric multiscale, fluid
 summary: The Partitioned Pipe — Geometric Axial Multiscale tutorial couples a 1D pipe model with a 3D CFD pipe using preCICE.
 ---

water-hammer/README.md

@@ -1,7 +1,8 @@
 ---
-title: Partitioned Water Hammer
+title: Water hammer
+permalink: tutorials-water-hammer.html
 keywords: OpenFOAM, Nutils, preCICE, geometric-multiscale, fluid, transient
-summary: The Partitioned Water Hammer tutorial simulates unsteady pressure wave propagation in pipe systems using different 1D and 3D configurations coupled via preCICE.
+summary: The water hammer tutorial simulates unsteady pressure wave propagation in pipe systems using different 1D and 3D configurations coupled via preCICE.
 ---
 
 {% note %}