Bump spring-boot-dependencies from 2.3.3.RELEASE to 2.3.4.RELEASE

Bumps [spring-boot-dependencies](https://github.com/spring-projects/spring-boot) from 2.3.3.RELEASE to 2.3.4.RELEASE.
- [Release notes](https://github.com/spring-projects/spring-boot/releases)
- [Commits](spring-projects/spring-boot@v2.3.3.RELEASE...v2.3.4.RELEASE)

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

Author: dependabot[bot]

samples/spring-boot-auto-config/pom.xml

@@ -61,7 +61,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.3.3.RELEASE</version>
+                <version>2.3.4.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>

samples/spring-boot-plain/pom.xml

@@ -58,7 +58,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.3.3.RELEASE</version>
+                <version>2.3.4.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>

spring-boot-starter/pom.xml

@@ -41,7 +41,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-dependencies</artifactId>
-                <version>2.3.3.RELEASE</version>
+                <version>2.3.4.RELEASE</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>