Merge pull request #2028 from scgbckbone/bip-0373-wording

nit: improve `PSBT_IN_MUSIG2_PARTIAL_SIG` wording

Author: murchandamus

bip-0373.mediawiki

@@ -91,7 +91,7 @@ it was derived from, if it was derived from an aggregate key.
 | rowspan="2"| 0, 2
 |-
 | The compressed public key of the participant providing this partial signature, followed by the
-compressed public key the participant is providing the signature for, followed by the [[bip-0341.mediawiki|BIP 341]] tapleaf hash
+compressed aggregate public key the participant is providing the signature for, followed by the [[bip-0341.mediawiki|BIP 341]] tapleaf hash
 of the Taproot leaf script that will be signed. If the aggregate key is the Taproot internal key or
 the Taproot output key, then the tapleaf hash must be omitted. Note that the compressed participant public key must be
 the Taproot output key or found in a script. It is not the internal key nor the aggregate public key that