Add dependency management for JSpecify

Closes gh-46776

Author: snicoll

platform/spring-boot-dependencies/build.gradle

@@ -1089,6 +1089,19 @@ bom {
 			releaseNotes("https://github.com/skyscreamer/JSONassert/releases/tag/jsonassert-{version}")
 		}
 	}
+	library("JSpecify", "1.0.0") {
+		group("org.jspecify") {
+			modules = [
+					"jspecify"
+			]
+		}
+		links {
+			site("https://jspecify.dev")
+			docs("https://jspecify.dev/docs/user-guide")
+			javadoc("https://jspecify.dev/docs/api", "org.jspecify")
+			releaseNotes("https://github.com/jspecify/jspecify/releases/tag/v{version}")
+		}
+	}
 	library("JTDS", "1.3.1") {
 		group("net.sourceforge.jtds") {
 			modules = [