Fix version inconsistency

Author: elgalu

CHANGELOG.md

@@ -1,24 +1,3 @@
-## 3.12.0-p4
- + **Changes:** https://github.com/elgalu/docker-selenium/compare/3.12.0-p3...3.12.0-p4 (2018-06-08)
-    + Leo Gallucci (1):
-        * [21f35d6] Upgrade Chromedriver minor to 2.40
- + **Image tag details:**
-    + Selenium version: 3.12.0 (7c6e0b3)
-    + Chrome stable:  67.0.3396.79
-    + Firefox stable: 60.0.2
-    + Geckodriver: 0.20.1
-    + Chromedriver: 2.40.565383 (76257d1ab79276b2d53ee976b2c3e3b9f335cde7)
-    + Java: OpenJDK Java 1.8.0_171-8u171-b11-0ubuntu0.16.04.1-b11
-    + Default Timezone: Europe/Berlin
-    + FROM ubuntu:xenial-20180417
-    + Python: 3.5.2
-    + Tested on kernel CI  host: 4.4.0-101-generic x86_64
-    + Built at CI  host with: Docker version 17.09.0, build afdb6d4
-    + Built at CI  host with: Docker Compose version 1.17.1, build 6d101fb
-    + Image version: 3.12.0-257
-    + Image size: 1.37GB
-    + Digest: sha256:f0b5e79e434b93371bafc1dace43f5a429bf0542ba0af4a1535e62d61cff2a22
-
 ## 3.12.0-p3
  + **Changes:** https://github.com/elgalu/docker-selenium/compare/3.12.0-p2...3.12.0-p3 (2018-06-07)
     + Leo Gallucci (1):