Unexpected attribute names conversion to lowercase of dynamic svg element

[ssssota]

Describe the bug

Attributes of dynamic svg element should preserve case.

<svelte:options namespace="svg" />
<!--viewbox-->
<svelte:element this="svg" viewBox="" />
<!--viewbox-->
<svelte:element this="svg" xmlns="http://www.w3.org/2000/svg" viewBox="" />
<!--viewBox-->
<svg viewBox="" />

should be rendered

<svg viewBox>
<svg viewBox>
<svg viewBox>

But,

<svg viewbox>
<svg viewbox>
<svg viewBox>

ref. ssssota/svelte-exmarkdown#272

Reproduction

https://svelte.dev/playground/21357a40ffb247698d1fb3b07d17ec3b?version=5.1.0

Logs

No response

System Info

System:
    OS: macOS 14.7
    CPU: (8) arm64 Apple M1
    Memory: 650.77 MB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 20.14.0 - ~/.local/share/mise/installs/node/lts/bin/node
    npm: 10.7.0 - ~/.local/share/mise/installs/node/lts/bin/npm
    pnpm: 9.12.2 - ~/.local/share/mise/installs/node/lts/bin/pnpm
    bun: 0.5.1 - ~/.bun/bin/bun
  Browsers:
    Chrome: 130.0.6723.69
    Safari: 18.0.1
  npmPackages:
    svelte: ^5.0.4 => 5.0.4

Severity

annoyance