Bump fabric-loom from 1.13.6 to 1.15.3

Bumps fabric-loom from 1.13.6 to 1.15.3.

---
updated-dependencies:
- dependency-name: fabric-loom
  dependency-version: 1.15.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -10,7 +10,7 @@ cloth-config = { group = "me.shedaniel.cloth", name = "cloth-config-fabric", ver
 handy-tests = { group = "me.melontini", name = "handy-tests", version = "0.2.0-1.20.1-build.9" }
 
 [plugins]
-fabric-loom = { id = "fabric-loom", version = "1.13.6" }
+fabric-loom = { id = "fabric-loom", version = "1.15.3" }
 lombok = { id = "io.freefair.lombok", version = "9.1.0"}
 spotless = { id = "com.diffplug.spotless", version = "8.1.0" }
 modmuss50-publish = { id = "me.modmuss50.mod-publish-plugin", version = "1.1.0" }