jobs/swh-environment: Bump timeout from 90 to 120 minutes

Recent changes in that build job (running all checks for each swh
package for instance) makes it exceed the 90 minutes timeout so
increase it by 30 minutes.

jobs/swh-environment.yaml

@@ -19,7 +19,7 @@
             - "*/master"
     wrappers:
       - timeout:
-          timeout: 90
+          timeout: 120
           abort: true
       - timestamps