Update e2e references to use v20.2.0 across the board

.github/workflows/e2e.yml

@@ -23,7 +23,7 @@ jobs:
 
       # core git ref should be latest commit for stable soroban functionality
       # the core bin can either be compiled in-line here as part of ci,
-      SYSTEM_TEST_CORE_GIT_REF: https://github.com/stellar/stellar-core.git#v20.1.0
+      SYSTEM_TEST_CORE_GIT_REF: https://github.com/stellar/stellar-core.git#v20.2.0
       SYSTEM_TEST_CORE_COMPILE_CONFIGURE_FLAGS: "--disable-tests"
       # or set SYSTEM_TEST_CORE_GIT_REF to empty, and set SYSTEM_TEST_CORE_IMAGE
       # to pull a pre-compiled image from dockerhub instead
@@ -45,17 +45,17 @@ jobs:
       SYSTEM_TEST_JS_STELLAR_SDK_GH_REF: 
 
       # the version of rs-stellar-xdr to use for quickstart
-      SYSTEM_TEST_RS_XDR_GIT_REF: v20.0.2
+      SYSTEM_TEST_RS_XDR_GIT_REF: v20.1.0
 
       # system test will build quickstart image internally to use for running the service stack
       # configured in standalone network mode(core, rpc)
-      SYSTEM_TEST_QUICKSTART_GIT_REF: https://github.com/stellar/quickstart.git#412bb828ddb4a93745227ab5ad97c623d43f3a5f
+      SYSTEM_TEST_QUICKSTART_GIT_REF: https://github.com/stellar/quickstart.git#eeb44ee99c564275654800edea2e426d73e966b8
 
       # triggers system test to log out details from quickstart's logs and test steps
       SYSTEM_TEST_VERBOSE_OUTPUT: "true"
 
       # the soroban test cases will compile various contracts from the examples repo
-      SYSTEM_TEST_SOROBAN_EXAMPLES_GIT_HASH: "v20.0.0"
+      SYSTEM_TEST_SOROBAN_EXAMPLES_GIT_HASH: "v20.2.0"
       SYSTEM_TEST_SOROBAN_EXAMPLES_GIT_REPO: "https://github.com/stellar/soroban-examples.git"
     steps:
       - uses: actions/checkout@v3