package/bitcoin: security bump to version 0.21.1

Tag as a security bump as having an up to date bitcoin is important:
https://patchwork.ozlabs.org/project/buildroot/patch/20200202085526.35742-1-james.hilliard1@gmail.com

https://github.com/bitcoin/bitcoin/blob/master/doc/release-notes/release-notes-0.21.1.md

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/bitcoin/bitcoin.hash

@@ -1,5 +1,5 @@
-# From https://bitcoincore.org/bin/bitcoin-core-0.21.0/SHA256SUMS.asc
-sha256  1a91202c62ee49fb64d57a52b8d6d01cd392fffcbef257b573800f9289655f37  bitcoin-0.21.0.tar.gz
+# From https://bitcoincore.org/bin/bitcoin-core-0.21.1/SHA256SUMS.asc
+sha256  caff23449220cf45753f312cefede53a9eac64000bb300797916526236b6a1e0  bitcoin-0.21.1.tar.gz
 
 # Hash for license file
 sha256  96fe807030b21f88305adc32af62f9aa19915f2783509fd6f52aea02cf83f644  COPYING

package/bitcoin/bitcoin.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-BITCOIN_VERSION = 0.21.0
+BITCOIN_VERSION = 0.21.1
 BITCOIN_SITE = https://bitcoincore.org/bin/bitcoin-core-$(BITCOIN_VERSION)
 BITCOIN_AUTORECONF = YES
 BITCOIN_LICENSE = MIT