fix mermaid issue in docs #577

Job	Run time
🚨 Lua lint	16s
🚨 REUSE Compliance	13s
🚨 C lint	19s
🐯 js build & checks (14.x)	3m 8s
🐯 js build & checks (16.x)	3m 9s
🐯 js build & checks (18.x)	2m 53s
🐹 go build & checks (1.13)	53s
🐹 go build & checks (1.14)	1m 3s
🐹 go build & checks (1.15)	1m 19s
🐹 go build & checks (1.16)	1m 2s
🐹 go build & checks (1.19)	46s
🥷 meson/ninja build (clang-9)	2m 25s
🥷 meson/ninja build (clang-10)	3m 3s
🥷 meson/ninja build (clang-11)	1m 56s
🥷 meson/ninja build (gcc-7)	3m 47s
🥷 meson/ninja build (gcc-8)	2m 35s
🥷 meson/ninja build (gcc-9)	2m 31s
🥷 meson/ninja build (gcc-10)	2m 48s
🐍 Python checks (ubuntu-latest, 3.8)	2m 13s
🐍 Python checks (ubuntu-latest, 3.9)	2m 2s
🐍 Python checks (ubuntu-latest, 3.10)	1m 43s
🐍 Python checks (macos-latest, 3.8)	3m 45s
🐍 Python checks (macos-latest, 3.9)	3m 44s
🐍 Python checks (macos-latest, 3.10)	3m 35s
🦀 rust build & checks (stable)	1m 30s
🦀 rust build & checks (nightly)	1m 49s
🤖 Semantic release	0s
🐍 Python build & checks	0s
🐍 Python build & check on armv7	0s
🐯 js build release	0s
🍎 mac osx release build	0s
🐧 Binary builds on Ubuntu	0s
🐍 Python create source distribution	0s
📦 Pack release	0s
📦 npm release	0s
📦 PyPI release	0s
🧻 Remove tag on fail	0s
	54m 27s

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