doc: correct analysepsbt rpc doc
doc: correct analysepsbt rpc doc

Github-Pull: #15559
Rebased-From: a4d0fd026b74db034dc8a1fa7efbd4f1dba8cdb9
Tree-SHA512: 43f985ccb1af22e416230b8f351396d1fa677ee4e60f6952962ed37e842f5746df8a58ae7c35d6a7518af4b5974ee753b17ec3578394122584ca10e9ed561268

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