chore: reduce maxWorkers from 150 to 80 in test workflow (#332)

Reduce workers to not overload the system.

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By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache-2.0 license

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Signed-off-by: github-actions <[email protected]>
Co-authored-by: github-actions <[email protected]>

Author: mrgrain

.github/workflows/integ.yml

@@ -1522,7 +1522,7 @@ new CdkCliIntegTestsWorkflow(repo, {
   testEnvironment: TEST_ENVIRONMENT,
   buildRunsOn: POWERFUL_RUNNER,
   testRunsOn: POWERFUL_RUNNER,
-  maxWorkers: '150',
+  maxWorkers: '80',
 
   localPackages: [
     cloudAssemblySchema.name,