Fix 2D plate example #6335

Job	Run time
Local: Build & test minimal package on Ubuntu	14s
Local: Build & test on Ubuntu	23s
Remote: Build & test (v22.2.1, false)	22s
Documentation style check	13s
Remote: Build & test (v23.1.0, false)	24s
Remote: Build & test (v23.2.0, false)	25s
Remote: Build & test (v24.1.0, false)	23s
Build and smoke tests (ubuntu-latest, 3.9, false)	26s
Local: Build & test on Windows	0s
Build and smoke tests (ubuntu-latest, 3.10, false)	29s
Build and smoke tests (ubuntu-latest, 3.11, false)	26s
Build and smoke tests (ubuntu-latest, 3.12, false)	28s
Build and smoke tests (windows-latest, 3.9, false)	16s
Build and smoke tests (windows-latest, 3.10, false)	13s
Build and smoke tests (windows-latest, 3.11, false)	13s
Build and smoke tests (windows-latest, 3.12, false)	12s
Build documentation	1s
Upload dev documentation	1s
Deploy dev index docs	1s
Notify failed build	1s
release	1s
Upload release documentation	1s
Deploy stable docs index	1s
	5m 14s

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