8265860: Update version .jcheck/conf in jdk15u to be 15.0.4

Reviewed-by: bae

.jcheck/conf

@@ -1,2 +1,28 @@
-project=jdk
-bugids=dup
+[general]
+project=jdk-updates
+jbs=JDK
+version=15.0.4
+
+[checks]
+error=author,committer,reviewers,issues,executable,symlink,message,hg-tag,whitespace
+
+[repository]
+tags=(?:jdk-(?:[1-9]([0-9]*)(?:\.(?:0|[1-9][0-9]*)){0,4})(?:\+(?:(?:[0-9]+))|(?:-ga)))|(?:jdk[4-9](?:u\d{1,3})?-(?:(?:b\d{2,3})|(?:ga)))|(?:hs\d\d(?:\.\d{1,2})?-b\d\d)
+branches=
+
+[census]
+version=0
+domain=openjdk.org
+
+[checks "whitespace"]
+files=.*\.cpp|.*\.hpp|.*\.c|.*\.h|.*\.java
+
+[checks "reviewers"]
+reviewers=1
+ignore=duke
+
+[checks "committer"]
+role=committer
+
+[checks "issues"]
+pattern=^([124-8][0-9]{6}): (\S.*)$