feat: upgrade to Spring Boot 3.5.8

build.gradle

@@ -37,7 +37,7 @@ repositories {
 // 'api' configuration allows to expose dependencies with 'compile' scope in pom
 // 'implementation' configuration allows to expose dependencies with 'runtime' scope in pom
 dependencies {
-    implementation platform('org.springframework.boot:spring-boot-dependencies:3.3.8')
+    implementation platform('org.springframework.boot:spring-boot-dependencies:3.5.8')
 
     // feign
     api "io.github.openfeign:feign-jackson:$openFeignVersion"

src/test/java/com/iexec/common/security/CipherHelperTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2023 IEXEC BLOCKCHAIN TECH
+ * Copyright 2020-2026 IEXEC BLOCKCHAIN TECH
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -110,7 +110,7 @@ void shouldFailToRsaDecryptWithNullKey() {
 
     @Test
     void errorExtractingRsaKeys() {
-        final String weirdCharacters = RandomStringUtils.randomAlphanumeric(256);
+        final String weirdCharacters = RandomStringUtils.secure().nextAlphanumeric(256);
         assertThat(plainText2RsaPrivateKey(weirdCharacters)).isNull();
         assertThat(plainText2RsaPublicKey(weirdCharacters)).isNull();
     }