ci: try to fix failing ppc61le

Author: gotson

.github/workflows/ci.yml

@@ -155,7 +155,7 @@ jobs:
 
           env: |
             SKIP_TEST_MULTIARCH: true
-            MAVEN_OPTS: ${{ env.MAVEN_OPTS }}
+            MAVEN_OPTS: ${{ env.MAVEN_OPTS || '-Xmx2g' }}
 #              -Dhttps.protocols=TLSv1.2
 #              -Djdk.tls.client.cipherSuites=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA
 #              -Djdk.tls.client.protocols=TLSv1.2