don't double-url-encode rss urls

What does this MR do?

url.searchParams.set() already encodes the values passed!

(this is a partial revert of 0472d43e, the change in statusbar-rss.vue was correct)

@kakkokari-gtyih you probably want to cherry-pick this: the rss reader in the status bar works fine, the widgets don't, because they get something like https%3A%2F%2Flobste.rs%2Frss instead of https://lobste.rs/rss

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requested review from @CenTdemeern1, @Marie, @tess, and @kakkokari-gtyih

approved this merge request

approved this merge request

mentioned in commit 771fcf00

merged

Thank you - I had been looking into this issue personally and had missed that!

This will be upstreamed by this PR: https://github.com/misskey-dev/misskey/pull/15272

mentioned in issue #875 (closed)