Enable Maven Threads.

.github/workflows/ci-main.yml

@@ -21,4 +21,4 @@ jobs:
     with:
       branch: 'main'
       verbose: ${{ inputs.verbose == 'true' }}
-      useMavenThreads: false
+      useMavenThreads: true

local/download-apps.sh

@@ -36,10 +36,10 @@ function download_deps() {
   MILESTONE=$(echo "$DEP" | grep -c "\-M")
   if ((SNAPSHOT > 0)); then
     INC_VER=true
-    URL="https://repo.spring.io/libs-snapshot"
+    URL="https://repo.spring.io/snapshot"
   elif ((MILESTONE > 0)); then
     INC_VER=false
-    URL="https://repo.spring.io/libs-milestone-local"
+    URL="https://repo.spring.io/milestone"
   else
     INC_VER=false
     URL="https://repo.maven.apache.org/maven2"