Merge pull request #11438 from nextcloud/dependabot/gradle/exoplayerVersion-2.18.4

Build(deps): Bump exoplayerVersion from 2.18.3 to 2.18.4

build.gradle

@@ -16,7 +16,7 @@ buildscript {
         workRuntime = "2.8.0"
         fidoVersion = "4.1.0-patch1"
         checkerVersion = "3.21.2"
-        exoplayerVersion = "2.18.3"
+        exoplayerVersion = "2.18.4"
         documentScannerVersion = "1.0.1"
         roomVersion = "2.5.0"