Update dependency me.clip:placeholderapi to v2.12.3 (#4897)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -14,7 +14,7 @@ log4j = "2.19.0"
 # Plugins
 worldedit = "7.2.20"
 fawe = "2.15.2"
-placeholderapi = "2.12.2"
+placeholderapi = "2.12.3"
 luckperms = "5.5"
 essentialsx = "2.21.2"
 mvdwapi = "3.1.1"