hack/OWNERS: add pohly as reviewer and approver

Several files that I maintain (primarily logcheck.conf right now, but
I'm also working on golangci-lint) are in this directory. It would be
useful to have approval rights to avoid delays.

hack/OWNERS

@@ -12,6 +12,7 @@ reviewers:
   - lavalamp
   - liggitt
   - mikedanese
+  - pohly
   - SataQiu
   - smarterclayton
   - spiffxp
@@ -28,6 +29,7 @@ approvers:
   - lavalamp
   - liggitt
   - mikedanese
+  - pohly # for logging and linting
   - pwittrock
   - SataQiu
   - smarterclayton