docs: document gradle build (#6371)

README.md

@@ -40,6 +40,26 @@ issues arise you may need to purge the database:
 - maven: `mvn org.owasp:dependency-check-maven:9.0.0:purge`
 - cli: `dependency-check.sh --purge`
 
+#### Gradle build Environment
+
+With 9.0.0 users may encounter issues with `NoSuchMethodError` exceptions due to
+dependency resolution. If you encounter this issue you will need to pin some of
+the transitive dependencies of dependency-check to specific versions. For example:
+
+/buildSrc/build.gradle
+```groovy
+dependencies {
+    constraints {
+        // org.owasp.dependencycheck needs at least this version of jackson. Other plugins pull in older versions..
+        add("implementation", "com.fasterxml.jackson:jackson-bom:2.16.0")
+
+        // org.owasp.dependencycheck needs these versions. Other plugins pull in older versions..
+        add("implementation", "org.apache.commons:commons-lang3:3.14.0")
+        add("implementation", "org.apache.commons:commons-text:1.11.0")
+    }
+}
+```
+
 ## Requirements
 
 ### Java Version