Merge bitcoin/bitcoin#31930: doc: Update translation generation instructions

75d5d23 doc: Update translation generation instructions (pablomartin4btc)

Pull request description:

  This is a follow-up of #31731.

  Technically this change [fixes](bitcoin/bitcoin#31731 (comment)) the preset configuration execution failure as it needs multiprocess to be enabled, so we disable it using `-DWITH_MULTIPROCESS=OFF`.

  This code will need to be updated by removing `-DWITH_MULTIPROCESS=OFF` in bitcoin/bitcoin#31741.

ACKs for top commit:
  ryanofsky:
    Code review ACK 75d5d23. Looks good as a temporary fix and I think after #31741 we should be able to drop the extra argument.

Tree-SHA512: 793e095aa277ab0ea864b49542cc6fe458f9a16123e244f92a77de84fe141837dc7bcc06f543539ad23aaa207c0ea49a47f3afb4493f13fcefb3af87ad7c7c4f

Author: fanquake

doc/translation_process.md

@@ -18,7 +18,7 @@ We use automated scripts to help extract translations in both Qt, and non-Qt sou
 
 To automatically regenerate the `bitcoin_en.ts` file, run the following commands:
 ```sh
-cmake --preset dev-mode -DWITH_USDT=OFF
+cmake --preset dev-mode -DWITH_USDT=OFF -DWITH_MULTIPROCESS=OFF
 cmake --build build_dev_mode --target translate
 ```