CI: same action versions as the rest of the org; README: CI badge

Author: Edrzapi

.github/workflows/ci.yml

@@ -20,10 +20,10 @@ jobs:
     # The steps run in order; the first failure stops the job.
     steps:
       # "uses" runs a published action. This one checks out this repository.
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v7
 
       - name: Set up Java 21
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v6
         # "with" passes inputs to the action.
         with:
           distribution: temurin
@@ -71,23 +71,23 @@ jobs:
       DATABASE_URL: ${{ matrix.database == 'postgresql' && 'postgresql://library:library@localhost:5432/library' || 'sqlite:///library.db' }}
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v7
 
       - name: Check out the contract
-        uses: actions/checkout@v5
+        uses: actions/checkout@v7
         with:
           repository: devfoundry-training/Library_API_Contract
           path: contract
 
       - name: Set up Java 21
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v6
         with:
           distribution: temurin
           java-version: "21"
           cache: maven
 
       - name: Set up Python for the conformance suite
-        uses: actions/setup-python@v6
+        uses: actions/setup-python@v7
         with:
           python-version: "3.13"
 

README.md

@@ -1,5 +1,7 @@
 # Library API: Spring Boot
 
+[![CI](https://github.com/devfoundry-training/Library_API_SpringBoot/actions/workflows/ci.yml/badge.svg)](https://github.com/devfoundry-training/Library_API_SpringBoot/actions/workflows/ci.yml)
+
 Part of the DevFoundry Library API series. This is the
 [Library API contract](https://github.com/devfoundry-training/Library_API_Contract) built with Spring Boot 3.5 on
 Java 21: Spring Web for the HTTP layer, Spring Data JPA and Hibernate for the data, Flyway for the migrations. It runs