Update scala-compiler, scala-library to 2.12.15

Author: scala-steward

.circleci/config.yml

@@ -103,7 +103,7 @@ workflows:
       - scala_job:
           name: 2.12.14
           java_version: jdk8
-          scala_version: 2.12.14
+          scala_version: 2.12.15
       - scala_job:
           name: 2.13.6
           java_version: jdk8
@@ -115,7 +115,7 @@ workflows:
       - scala_job:
           name: jdk11_2.12
           java_version: jdk11
-          scala_version: 2.12.14
+          scala_version: 2.12.15
       - scala_job:
           name: jdk11_2.13
           java_version: jdk11
@@ -127,7 +127,7 @@ workflows:
       - scala_job:
           name: jdk17_2.12
           java_version: jdk17
-          scala_version: 2.12.14
+          scala_version: 2.12.15
       - scala_job:
           name: jdk17_2.13
           java_version: jdk17
@@ -138,7 +138,7 @@ workflows:
           scala_version: 3.0.2
       - scalajs_job:
           name: sjs1.0_2.12
-          scala_version: 2.12.14
+          scala_version: 2.12.15
           scalajs_version: 1.7.0
       - scalajs_job:
           name: sjs1.0_2.13
@@ -150,7 +150,7 @@ workflows:
           scalajs_version: 1.7.0
       - scalanative_job:
           name: native0.4_2.12
-          scala_version: 2.12.14
+          scala_version: 2.12.15
           scalanative_version: 0.4.0
       - scalanative_job:
           name: native0.4_2.13