Upgrade to Spring Framework 7.0 RC1.

Closes #938

Author: mp911de

pom.xml

@@ -47,7 +47,7 @@
 		<netty.version>4.2.6.Final</netty.version>
 		<nullaway.version>0.12.10</nullaway.version>
 		<okhttp3.version>3.14.9</okhttp3.version>
-		<spring.version>7.0.0-M9</spring.version>
+		<spring.version>7.0.0-RC1</spring.version>
 		<spring-data-bom.version>2025.1.0-M6</spring-data-bom.version>
 		<spring-security-bom.version>7.0.0-M3</spring-security-bom.version>
 		<reactor.version>2025.0.0-M5</reactor.version>