Don't decode twice

[neominik]

Since the fix is pretty simple, I made a PR. Fixes #2248

[apollo-cla]

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[o0Ignition0o]

Oh interesting! I'll have a look at it today, since this will have moved in #2170

[o0Ignition0o]

the tests fail because the branch isnt up to date with dev, do you mind merging dev into your branch? :)

[o0Ignition0o]

This looks great! Let's add a changelog section and land this tomorrow!

[neominik]

Great. Thanks for looking into this! I'm not entirely sure how the changelog thing is supposed to work, because there is NEXT_CHANGELOG which is empty and CHANGELOG which contains all the changes, but not for upcoming releases. So would be nice if you could put this into the right place in the correct format. (Feel free to use a better description)

### Wrong urldecoding for variables in get requests ([Issue #2248](https://github.com/apollographql/router/issues/2248))

Using APQs, any '+' characters would be replaced by spaces in variables, breaking for instance datetimes with timezone info.

By [@neominik](https://github.com/neominik) in https://github.com/apollographql/router/pull/2249

(edit: I've put the entry into the changelog now)

[o0Ignition0o]

This is awesome, thanks! 🎉