Fix jakarta.servlet-api not being inherited from alpine-server

For some reason the inheritance of this transitive dependency stopped working over night(?), despite nothing having changed in either Alpine or Dependency-Track since the last successful build.

Building an executable WAR succeeds, but other Maven goals such as `datanucleus:enhance` or `verify` fail due to the missing servlet API.

Signed-off-by: nscuro <nscuro@protonmail.com>

pom.xml

@@ -206,6 +206,12 @@
             <version>${lib.json-java.version}</version>
         </dependency>
 
+        <dependency>
+            <groupId>jakarta.servlet</groupId>
+            <artifactId>jakarta.servlet-api</artifactId>
+            <scope>provided</scope>
+        </dependency>
+
         <dependency>
             <groupId>com.github.package-url</groupId>
             <artifactId>packageurl-java</artifactId>