Update backend dependencies.

backend/codiki-exposition/build.gradle.kts

@@ -7,5 +7,5 @@ dependencies {
     implementation(project(":codiki-domain"))
     implementation("org.springframework.boot:spring-boot-starter-web")
     implementation("org.springframework.boot:spring-boot-starter-security")
-    implementation("org.apache.tika:tika-core:3.2.3")
+    implementation("org.apache.tika:tika-core:4.0.0")
 }