chore(deps): bump com.github.johnrengelman.shadow

Bumps com.github.johnrengelman.shadow from 7.1.2 to 8.1.1.

---
updated-dependencies:
- dependency-name: com.github.johnrengelman.shadow
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

backend/crawlers/rm3l.org/build.gradle

@@ -24,7 +24,7 @@
 plugins {
     id 'application'
     id "org.jetbrains.kotlin.jvm"
-    id "com.github.johnrengelman.shadow" version "7.1.2"
+    id "com.github.johnrengelman.shadow" version "8.1.1"
     id "com.google.cloud.tools.jib" version "3.4.3"
 }