title: pg_repack version mismatch after maintenance on cloud sql (GCP)
body: <p>I have a cloud-sql postgres11 instance on GCP and use pg_repack cron for cleaning my database. I've noticed that since last maintenance occurred (7th of March 21) I cannot perform a repack.
  When tried to manually run a repack I encountered this error message:</p>
  <blockquote>
  <p>ERROR: pg_repack failed with error: program 'pg_repack 1.4.4' does not match database library 'pg_repack 1.4.6'</p>
  </blockquote>
  <p>Did the following checks:</p>
  <ul>
  <li>what is the version of pg_repack loaded:</li>
  </ul>
  <pre><code>                                       List of installed extensions
          Name        | Version |   Schema   |                         Description
  --------------------+---------+------------+--------------------------------------------------------------
   pg_repack          | 1.4.4   | public     | Reorganize tables in PostgreSQL databases with minimal locks
   pg_stat_statements | 1.6     | public     | track execution statistics of all SQL statements executed
   plpgsql            | 1.0     | pg_catalog | PL/pgSQL procedural language
  (3 rows)
  </code></pre>
  <ul>
  <li>what is the available version of pg_repack:</li>
  </ul>
  <pre><code>   name    | version | installed | superuser | relocatable | schema | requires |                           comment
  -----------+---------+-----------+-----------+-------------+--------+----------+--------------------------------------------------------------
   pg_repack | 1.4.4   | t         | t         | f           |        |          | Reorganize tables in PostgreSQL databases with minimal locks
  (1 row)
  </code></pre>
  <p>I upgraded pg_repack to version 1.4.6 and it did not help, I also tried to drop and create the extension, or restart the sql-instance with no luck. :-(</p>
  <p>I wonder if someone had encouctered this issue. If so, is there any solution?</p>