Upgrade to GraalVM 21.3.0

Closes gh-1472

Author: sdeleuze

pom.xml

@@ -11,7 +11,7 @@
 
 	<properties>
 		<revision>0.10.6-SNAPSHOT</revision>
-		<graalvm.version>21.2.0</graalvm.version>
+		<graalvm.version>21.3.0</graalvm.version>
 		<docs.resources.version>0.2.1.RELEASE</docs.resources.version>
 		<spring.boot.version>2.5.9</spring.boot.version>
 		<spring.cloud.version>2020.0.4</spring.cloud.version>

spring-native-docs/src/main/asciidoc/attributes.adoc

@@ -20,7 +20,7 @@
 :github-issues: https://github.com/{github-repo}/issues
 :github-prs: https://github.com/{github-repo}/pulls
 
-:graalvm-version: 21.2.0
+:graalvm-version: 21.3.0
 :graalvm-docs: https://www.graalvm.org/reference-manual
 :graalvm-native-docs: {graalvm-docs}/native-image
 :graalvm-native-buildtools: https://github.com/graalvm/native-build-tools