Adjust library extension for PG16

Since 3727aa7 we use PG16 for homebrew builds. However, since PG 16 the extension of the library has changed to .dylib. This patch adjusts the installation scripts.

timescaledb.rb

@@ -31,7 +31,7 @@ def install
     `chmod +x timescaledb_move.sh`
     `echo "#!/bin/bash" >> timescaledb_move.sh`
     `echo "echo 'Moving files into place...'" >> timescaledb_move.sh`
-    `echo "/usr/bin/install -c -m 755 \\\$(find #{lib} -name timescaledb*.so) #{libdir.strip}/" >> timescaledb_move.sh`
+    `echo "/usr/bin/install -c -m 755 \\\$(find #{lib} -name timescaledb*.dylib) #{libdir.strip}/" >> timescaledb_move.sh`
     `echo "/usr/bin/install -c -m 644 #{share}/timescaledb/* #{sharedir.strip}/extension/" >> timescaledb_move.sh`
     `echo "echo 'Success.'" >> timescaledb_move.sh`
     bin.install "timescaledb_move.sh"