GitHub+scripts: use bitcoind v27.0

.github/workflows/main.yml

@@ -21,7 +21,7 @@ defaults:
     shell: bash
 
 env:
-  BITCOIN_VERSION: "26"
+  BITCOIN_VERSION: "27"
 
   # If you change this value, please change it in the following files as well:
   # /.travis.yml

scripts/install_bitcoind.sh

@@ -10,7 +10,7 @@ if [ -z "$BITCOIND_VERSION" ]; then
   exit 1
 fi
 
-docker pull lightninglabs/bitcoin-core:$BITCOIND_VERSION
-CONTAINER_ID=$(docker create lightninglabs/bitcoin-core:$BITCOIND_VERSION)
-sudo docker cp $CONTAINER_ID:/opt/bitcoin-$BITCOIND_VERSION.0/bin/bitcoind /usr/local/bin/bitcoind
+docker pull lightninglabs/bitcoin-core:${BITCOIND_VERSION}
+CONTAINER_ID=$(docker create lightninglabs/bitcoin-core:${BITCOIND_VERSION})
+sudo docker cp $CONTAINER_ID:/opt/bitcoin-${BITCOIND_VERSION}.0/bin/bitcoind /usr/local/bin/bitcoind
 docker rm $CONTAINER_ID