Update !dmde bang to use current DM.de search endpoint

[WinkelCode]

This PR changes the search URL pattern for !dmde from https://www.dm.de/search/468652.html?type=product&q={{{s}}} to https://www.dm.de/search?query={{{s}}} as the previous one just redirected to the website's home page.

I noticed that the !dmde bang didn't work, so I submitted a test query and noted the working URL pattern. Opening the URL: https://www.dm.de/search?query=Hello+World works as expected and the space character parsed correctly by the website.

AI use disclosure

The following prompt for GitHub Copilot Agent was used:

Search !bangs are stored in /data/bangs.json, I want to fix the one for !dmde, it's currently:

  {
    "s": "DM.DE",
    "d": "www.dm.de",
    "t": "dmde",
    "u": "https://www.dm.de/search/468652.html?type=product&q={{{s}}}",
    "c": "Shopping",
    "sc": "Online"
  },

The url should be changed to "https://www.dm.de/search?query={{{s}}}".

Edit: The website adds the: &searchProviderType=dm-products parameter to the URL when searching. I intentionally omitted it as it is added automatically when it's missing, and this offers a bit more reliability should the default search target name or pattern change.

Other options are:

&searchProviderType=pharmacy-products and &searchProviderType=content - these can be manually selected in a tab menu after submitting a search query.