Merge #20945: Fix 0.21.0 release note to specify correct option BIP 157 support

9a42b5e Fix 0.21.0 release note to specify correct option BIP 157 support (benthecarman)

Pull request description:

  https://github.com/bitcoin/bitcoin/blob/master/src/init.cpp#L452

ACKs for top commit:
  mjdietzx:
    ACK 9a42b5e
  laanwj:
    ACK 9a42b5e

Tree-SHA512: 901195434046fd8a18a2329104b69e0ecc1bdb2bba1fe0688fb4a7c5992e9bdd66b8e50f46873f4ddf5ffe3c9aed860ccb01584812b06d865bd06fcd2b14c42b

Author: laanwj

doc/release-notes/release-notes-0.21.0.md

@@ -100,7 +100,7 @@ P2P and network changes
 - This release adds support for serving
   [BIP157](https://github.com/bitcoin/bips/blob/master/bip-0157.mediawiki) compact
   filters to peers on the network when enabled using
-  `-blockfilterindex=1 -peercfilters=1`. (#16442)
+  `-blockfilterindex=1 -peerblockfilters=1`. (#16442)
 
 - This release adds support for signets
   ([BIP325](https://github.com/bitcoin/bips/blob/master/bip-0325.mediawiki)) in