doc: updated credits and changelog.

doc/changelog.dox

@@ -172,6 +172,10 @@ See also:
 
 @subsubsection changelog-latest-new-meshtools MeshTools library
 
+-   New @ref MeshTools::boundingSphereBouncingBubble() algorithm for
+    calculating a tight bounding sphere for a mesh, along with a trivial
+    @ref MeshTools::boundingBoxAxisAligned() for AABBs (see
+    [mosra/magnum#557](https://github.com/mosra/magnum/pull/557))
 -   Added @ref MeshTools::generateQuadIndices() for quad triangulation
     including non-convex and non-planar quads
 -   New @ref MeshTools::filterOnlyAttributes() and

doc/credits.dox

@@ -192,9 +192,9 @@ Are the below lists missing your name or something's wrong?
 -   **Olga Turanksaya** ([\@olga-python](https://github.com/olga-python)) ---
     Gentoo ebuild)
 -   **Pablo Escobar** ([\@pezcode](https://github.com/pezcode)) --- @ref Math
-    additions, support for multiple @ref Platform::EmscriptenApplication
-    canvases on one page, Emscripten-focused fixes;
-    @ref Platform::Sdl2Application additions
+    and @ref MeshTools additions, support for multiple
+    @ref Platform::EmscriptenApplication canvases on one page,
+    Emscripten-focused fixes, @ref Platform::Sdl2Application additions
 -   **Pascal Thomet** ([\@pthom](https://github.com/pthom)) --- C++17
     compilation fixes, buildsystem improvements, Hunter package
 -   **Sam Spilsbury** ([\@smspillaz](https://github.com/smspillaz)) --- WebGL