fixed bitcoin URL

spells/menu/install-bitcoin

@@ -31,7 +31,7 @@ install_bitcoin_from_source() {
 install_bitcoin_arm_binary() {
     say "Installing Bitcoin Core ARM precompiled binary"
     if [ ! -e bitcoin-$BITCOIN_VERSION* ]; then
-        wget https://bitcoin.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-arm-linux-gnueabihf.tar.gz
+        wget https://bitcoincore.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-arm-linux-gnueabihf.tar.gz
         tar -xzf bitcoin-$BITCOIN_VERSION-arm-linux-gnueabihf.tar.gz
     fi
     sudo install -m 0755 -o root -g root -t /usr/local/bin bitcoin-$BITCOIN_VERSION/bin/*
@@ -41,7 +41,7 @@ install_bitcoin_arm_binary() {
 install_bitcoin_x86_64_binary() {
     say "Installing Bitcoin Core x86_64 precompiled binary"
     if [ ! -e bitcoin-$BITCOIN_VERSION* ]; then
-        wget https://bitcoin.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-x86_64-linux-gnu.tar.gz
+        wget https://bitcoincore.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-x86_64-linux-gnu.tar.gz
         tar -xzf bitcoin-$BITCOIN_VERSION-x86_64-linux-gnu.tar.gz
     fi
     sudo install -m 0755 -o root -g root -t /usr/local/bin bitcoin-$BITCOIN_VERSION/bin/*
@@ -51,7 +51,7 @@ install_bitcoin_x86_64_binary() {
 install_bitcoin_macos_binary() {
     say "Installing Bitcoin Core macOS precompiled binary"
     if [ ! -e bitcoin-$BITCOIN_VERSION* ]; then
-        wget https://bitcoin.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-osx-signed.dmg
+        wget https://bitcoincore.org/bin/bitcoin-core-$BITCOIN_VERSION/bitcoin-$BITCOIN_VERSION-osx-signed.dmg
         hdiutil attach bitcoin-$BITCOIN_VERSION-osx-signed.dmg
         cp -R /Volumes/Bitcoin-Core/Bitcoin-Qt.app /Applications/
         hdiutil detach /Volumes/Bitcoin-Core