CI: update to current best practices

Author: ctrueden

.github/build.sh

@@ -1,3 +1,3 @@
 #!/bin/sh
-curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-build.sh
+curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/main/ci-build.sh
 sh ci-build.sh

.github/setup.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
-curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/master/ci-setup-github-actions.sh
+curl -fsLO https://raw.githubusercontent.com/scijava/scijava-scripts/main/ci-setup-github-actions.sh
 sh ci-setup-github-actions.sh
 
 # Let the Linux build handle artifact deployment.

.github/workflows/build.yml

@@ -19,9 +19,9 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Java
-        uses: actions/setup-java@v3
+        uses: actions/setup-java@v4
         with:
           java-version: '8'
           distribution: 'zulu'
@@ -37,6 +37,6 @@ jobs:
           GPG_PASSPHRASE: ${{ secrets.GPG_PASSPHRASE }}
           MAVEN_USER: ${{ secrets.MAVEN_USER }}
           MAVEN_PASS: ${{ secrets.MAVEN_PASS }}
-          OSSRH_USER: ${{ secrets.OSSRH_USER }}
-          OSSRH_PASS: ${{ secrets.OSSRH_PASS }}
+          CENTRAL_USER: ${{ secrets.CENTRAL_USER }}
+          CENTRAL_PASS: ${{ secrets.CENTRAL_PASS }}
           SIGNING_ASC: ${{ secrets.SIGNING_ASC }}