Lock mermaid node module to 9.1.6 version for bullseye nodejs

debian/patches/nodejs/0090-lock-mermaid-version.patch

@@ -0,0 +1,13 @@
+webpack fails with mermaid 9.4.3 on bullseye, and 9.1.6 is known to work
+
+--- a/package.json
++++ b/package.json
+@@ -151,7 +151,7 @@
+     "marked": "^4.0.18",
+     "mathjax": "3",
+     "mdurl": "^1.0.1",
+-    "mermaid": "^9.1.3",
++    "mermaid": "9.1.6",
+     "micromatch": "^4.0.5",
+     "minimatch": "^3.0.4",
+     "monaco-editor": "^0.30.1",

debian/patches/series

@@ -22,6 +22,7 @@ nodejs/0050-add-babel-plugins.patch
 nodejs/0060-use-system-yaml.patch
 nodejs/0070-use-system-katex.patch
 nodejs/0080-use-matching-tiptap-core.patch
+nodejs/0090-lock-mermaid-version.patch
 tweaks/0010-source-init-functions.patch
 tweaks/0020-fix-mail-room-path.patch
 tweaks/0030-fix-gitlab-yml-path.patch