Use environment variables for github creds

Update CI to use the environment variables directly for GitHub access.

Author: philwebb

ci/pipeline.yml

@@ -70,7 +70,7 @@ jobs:
       file: git-repo/ci/tasks/release.yml
       params:
         GITHUB_USERNAME: ((github-username))
-        GITHUB_TOKEN: ((github-ci-release-token))
+        GITHUB_PASSWORD: ((github-ci-release-token))
   - put: git-repo
     params:
       repository: release-git-repo

ci/scripts/release.sh

@@ -31,4 +31,4 @@ popd > /dev/null
 echo $releaseVersion > built-artifact/version
 echo v$releaseVersion > built-artifact/tag
 cp release-git-repo/target/github-changelog-generator.jar built-artifact/
-java -jar release-git-repo/target/github-changelog-generator.jar --github.username=${GITHUB_USERNAME} --github.password=${GITHUB_TOKEN} --changelog.repository=spring-io/github-changelog-generator $releaseVersion built-artifact/release-notes.md
+java -jar release-git-repo/target/github-changelog-generator.jar --changelog.repository=spring-io/github-changelog-generator $releaseVersion built-artifact/release-notes.md

ci/tasks/release.yml

@@ -7,7 +7,7 @@ outputs:
 - name: built-artifact
 params:
   GITHUB_USERNAME:
-  GITHUB_TOKEN:
+  GITHUB_PASSWORD:
 caches:
 - path: maven
 run: