Update changed homebrew path

The path to PostgreSQL has changed. This PR adjusts the needed
environment variable.

.github/workflows/homebrew.yaml

@@ -10,6 +10,7 @@ name: Homebrew
     branches:
     - release_test
     - trigger/package_test
+    - trigger/homebrew_test
 
 jobs:
   homebrew:
@@ -28,7 +29,7 @@ jobs:
     - name: Setup
       run: |
         brew install postgresql@16
-        echo "/usr/local/opt/postgresql@16/bin" >> $GITHUB_PATH
+        echo "/opt/homebrew/opt/postgresql@16/bin" >> $GITHUB_PATH
         brew tap timescale/tap
         brew info timescaledb