Fix snapshot publishing to use Maven Central instead of GitHub Packages

Author: edburns

.github/workflows/publish-snapshot.yml

@@ -1,4 +1,4 @@
-name: Publish Snapshot to GitHub Packages
+name: Publish Snapshot to Maven Central
 
 env:
     HUSKY: 0
@@ -8,15 +8,14 @@ on:
 
 permissions:
     contents: read
-    packages: write
 
 concurrency:
     group: publish-snapshot
     cancel-in-progress: false
 
 jobs:
     publish-snapshot:
-        name: Publish SNAPSHOT to GitHub Packages
+        name: Publish SNAPSHOT to Maven Central
         runs-on: ubuntu-latest
         steps:
             - uses: actions/checkout@v6
@@ -31,9 +30,9 @@ jobs:
                   java-version: "17"
                   distribution: "temurin"
                   cache: "maven"
-                  server-id: github
-                  server-username: PACKAGES_USERNAME
-                  server-password: PACKAGES_TOKEN
+                  server-id: central
+                  server-username: MAVEN_USERNAME
+                  server-password: MAVEN_PASSWORD
 
             - name: Verify version is a SNAPSHOT
               run: |
@@ -45,10 +44,10 @@ jobs:
                   fi
                   echo "### Snapshot Publish" >> $GITHUB_STEP_SUMMARY
                   echo "- **Version:** $VERSION" >> $GITHUB_STEP_SUMMARY
-                  echo "- **Repository:** GitHub Packages (github/copilot-sdk-java)" >> $GITHUB_STEP_SUMMARY
+                  echo "- **Repository:** Maven Central Snapshots" >> $GITHUB_STEP_SUMMARY
 
             - name: Deploy Snapshot
               run: mvn -B deploy -DskipTests
               env:
-                  PACKAGES_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-                  PACKAGES_USERNAME: ${{ github.actor }}
+                  MAVEN_USERNAME: ${{ secrets.MAVEN_CENTRAL_USERNAME }}
+                  MAVEN_PASSWORD: ${{ secrets.MAVEN_CENTRAL_PASSWORD }}