Bump net.fabricmc:fabric-loader from 0.15.2 to 0.15.7

Bumps net.fabricmc:fabric-loader from 0.15.2 to 0.15.7.

---
updated-dependencies:
- dependency-name: net.fabricmc:fabric-loader
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ parchment_mappings = "2023.08.20"
 
 forge = "1.20.1-47.1.3"
 
-fabric_loader = "0.15.2"
+fabric_loader = "0.15.7"
 fabric_api = "0.91.0+1.20.1"
 
 mdg_plugin = "1.4.3"