Summary:
2132441a27c514fa7c5bd65db80b43fc662bbc4a / D42959 included a typo: `\'dummy'\ ` instead of `\'dummy\' `. This caused java builds to fail compilation:
```
yugabyte-db/java/yb-pgsql/src/test/java/org/yb/pgsql/BasePgSQLTest.java:[156,87] illegal escape character
```

Fix by moving the backslash to the correct spot.
Jira: DB-16142

Test Plan:
```
./yb_build.sh --scb
```

Reviewers: zdrudi

Reviewed By: zdrudi

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D43145