This is already fixed on the 5.5 branch: SW-21256 - Remove h2 tag in theme header · shopware/shopware@b1a7b30 · GitHub
You can make the changes according to this commit.
This is already fixed on the 5.5 branch: SW-21256 - Remove h2 tag in theme header · shopware/shopware@b1a7b30 · GitHub
You can make the changes according to this commit.