scripts+GitHub: use bitcoind v29.0rc2

Author: guggero

Diff for: .github/workflows/main.yml

@@ -21,7 +21,7 @@ defaults:
     shell: bash
 
 env:
-  BITCOIN_VERSION: "28"
+  BITCOIN_VERSION: "29"
 
   # TRANCHES defines the number of tranches used in the itests.
   TRANCHES: 16

Diff for: scripts/install_bitcoind.sh

@@ -5,11 +5,11 @@ set -ev
 BITCOIND_VERSION=$1
 
 # Useful for testing RCs: e.g. TAG_SUFFIX=.0rc1, DIR_SUFFIX=.0rc1
-TAG_SUFFIX=
-DIR_SUFFIX=.0
+TAG_SUFFIX=rc2
+DIR_SUFFIX=.0rc2
 
 # Useful for testing against an image pushed to a different Docker repo.
-REPO=lightninglabs/bitcoin-core
+REPO=guggero/bitcoin-core
 
 if [ -z "$BITCOIND_VERSION" ]; then
   echo "Must specify a version of bitcoind to install."