Bump spring-boot-starter-web in /plugins/gradle/example-server (#287)

Bumps [spring-boot-starter-web](https://github.com/spring-projects/spring-boot) from 2.3.2.RELEASE to 2.3.3.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.3.2.RELEASE...v2.3.3.RELEASE)
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Co-authored-by: Ndependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

plugins/gradle/example-server/build.gradle

@@ -12,7 +12,7 @@ plugins {
 mainClassName = "io.github.kobylynskyi.product.Application"
 
 dependencies {
-    implementation "org.springframework.boot:spring-boot-starter-web:2.3.2.RELEASE"
+    implementation "org.springframework.boot:spring-boot-starter-web:2.3.3.RELEASE"
     implementation "org.springframework.boot:spring-boot-starter-data-mongodb:2.3.3.RELEASE"
 
     implementation "com.graphql-java-kickstart:graphql-spring-boot-starter:7.1.0"