Use StringUtils.uriDecode where feasible

[nosan]

See #44677 for the background

Related to spring-projects/spring-framework#34673

In Spring Boot 4.x, this method can be replaced with StringUtils.uriDecode.

https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/opentelemetry/OpenTelemetryResourceAttributes.java#L164

[nosan]

These could possibly be replaced as well:

• https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-tools/spring-boot-loader/src/main/java/org/springframework/boot/loader/net/util/UrlDecoder.java
• https://github.com/spring-projects/spring-boot/blob/main/spring-boot-project/spring-boot-tools/spring-boot-loader-classic/src/main/java/org/springframework/boot/loader/jar/JarURLConnection.java#L306