Add @codeql-go as code owners for the shared data-flow library files

Author: owen-mc

CODEOWNERS

@@ -10,3 +10,10 @@
 /java/**/experimental/**/* @github/codeql-java @xcorail
 /javascript/**/experimental/**/* @github/codeql-javascript @xcorail
 /python/**/experimental/**/* @github/codeql-python @xcorail
+
+# Notify members of codeql-go about PRs to the shared data-flow library files
+/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl.qll @github/codeql-java @github/codeql-go
+/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImpl2.qll @github/codeql-java @github/codeql-go
+/java/ql/src/semmle/code/java/dataflow/internal/DataFlowImplCommon.qll @github/codeql-java @github/codeql-go
+/java/ql/src/semmle/code/java/dataflow/internal/tainttracking1/TaintTrackingImpl.qll @github/codeql-java @github/codeql-go
+/java/ql/src/semmle/code/java/dataflow/internal/tainttracking2/TaintTrackingImpl.qll @github/codeql-java @github/codeql-go