doc: fix Tesseract names in open source shapeopt showcase (#409)

Fix tesseract names.

<!--
Please use a PR title that conforms to *conventional commits*:
"<commit_type>: Describe your change"; for example: "fix: prevent race
condition". Some other commit types are: fix, feat, ci, doc, refactor...
For a full list of commit types visit
https://www.conventionalcommits.org/en/v1.0.0/
-->

#### Relevant issue or PR
<!-- If the changes resolve an issue or follow some other PR, link to
them here. Only link something if it is directly relevant. -->

#### Description of changes
<!-- Add a high-level description of changes, focusing on the *what* and
*why*. -->

#### Testing done
<!-- Describe how the changes were tested; e.g., "CI passes", "Tested
manually in stagingrepo#123", screenshots of a terminal session that
verify the changes, or any other evidence of testing the changes. -->

Author: andrinr

demo/_showcase/ansys-shapeopt/optimization_os.ipynb

@@ -38,8 +38,8 @@
     "\n",
     "tesseract_core.build_tesseract(\"sdf_fd\", \"latest\")\n",
     "tesseract_core.build_tesseract(\"bars_3d\", \"latest\")\n",
-    "tesseract_core.build_tesseract(\"meshing_tess\", \"latest\")\n",
-    "tesseract_core.build_tesseract(\"meshing_tess\", \"latest\")\n",
+    "tesseract_core.build_tesseract(\"hex_mesh\", \"latest\")\n",
+    "tesseract_core.build_tesseract(\"jax_fem\", \"latest\")\n",
     "print(\"Tesseract built successfully.\")"
    ]
   },