still hate sed - try to fix using var

Author: biozal

.github/workflows/kind-maven.yaml

@@ -56,7 +56,7 @@ jobs:
           echo "connectionString = ${envIpAddress}:${envIpPort}?network=external" >> $GITHUB_ENV 
       - name: fix connection string
         run: |
-          sed -i 's/127.0.0.1/'"$connectionString"'/' src/main/java/org/couchbase/quickstart/configs/ConfigDb.java
+          sed -i "s|127.0.0.1|$connectionString|" src/main/java/org/couchbase/quickstart/configs/ConfigDb.java
       - name: validate file fix
         run: cat src/main/java/org/couchbase/quickstart/configs/ConfigDb.java 
       - name: Build with Maven