Set GHA job timeout down to 1 hour (from 6)

A successful run of the jobs should take on the order of 20-30
minutes, so this timeout gives about twice that for headroom.
This should cause stuck jobs to fail faster than the default of
6 hours.

Signed-off-by: Jonathan Dowland <[email protected]>

Author: jmtd

.github/workflows/image-workflow-template.yml

@@ -10,6 +10,7 @@ env:
 jobs:
   openjdkci:
     name: OpenJDK S2I Build and Test
+    timeout-minutes: 60
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false