Bump spring-boot-starter-web

Bumps [spring-boot-starter-web](https://github.com/spring-projects/spring-boot) from 2.1.0.RELEASE to 2.5.12.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](https://github.com/spring-projects/spring-boot/compare/v2.1.0.RELEASE...v2.5.12)

---
updated-dependencies:
- dependency-name: org.springframework.boot:spring-boot-starter-web
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

spring-boot/spring-boot-openapi/specification/pom.xml

@@ -21,7 +21,7 @@
         <threetenbp-version>1.3.8</threetenbp-version>
         <datatype-threetenbp-version>2.6.4</datatype-threetenbp-version>
         <spring-boot-starter-test-version>2.1.1.RELEASE</spring-boot-starter-test-version>
-        <spring-boot-starter-web-version>2.1.0.RELEASE</spring-boot-starter-web-version>
+        <spring-boot-starter-web-version>2.5.12</spring-boot-starter-web-version>
         <junit-version>4.12</junit-version>
         <migbase64-version>2.2</migbase64-version>
         <jackson-databind-nullable>0.2.1</jackson-databind-nullable>