Bump version for 7.12.0 release

.ci/bwcVersions

@@ -31,7 +31,7 @@ BWC_VERSION:
   - "7.11.0"
   - "7.11.1"
   - "7.11.2"
-  - "7.11.3"
   - "7.12.0"
+  - "7.12.1"
   - "7.13.0"
   - "8.0.0"

server/src/main/java/org/elasticsearch/Version.java

@@ -78,8 +78,8 @@ public class Version implements Comparable<Version>, ToXContentFragment {
     public static final Version V_7_11_0 = new Version(7110099, org.apache.lucene.util.Version.LUCENE_8_7_0);
     public static final Version V_7_11_1 = new Version(7110199, org.apache.lucene.util.Version.LUCENE_8_7_0);
     public static final Version V_7_11_2 = new Version(7110299, org.apache.lucene.util.Version.LUCENE_8_7_0);
-    public static final Version V_7_11_3 = new Version(7110399, org.apache.lucene.util.Version.LUCENE_8_7_0);
     public static final Version V_7_12_0 = new Version(7120099, org.apache.lucene.util.Version.LUCENE_8_8_0);
+    public static final Version V_7_12_1 = new Version(7120199, org.apache.lucene.util.Version.LUCENE_8_8_0);
     public static final Version V_7_13_0 = new Version(7130099, org.apache.lucene.util.Version.LUCENE_8_8_0);
     public static final Version V_8_0_0 = new Version(8000099, org.apache.lucene.util.Version.LUCENE_8_8_0);
     public static final Version CURRENT = V_8_0_0;