Add @tmthrgd to go-dns fuzzing project access (#5083)

* Add myself to go-dns fuzzing project

https://github.com/miekg/dns/graphs/contributors should adequately explain why.

* Add missing main_repo

Co-authored-by: Abhishek Arya <inferno@chromium.org>

projects/go-dns/project.yaml

@@ -1,9 +1,11 @@
 homepage: "https://github.com/miekg/dns"
 primary_contact: "miek@miek.nl"
-auto_ccs :
-- "p.antoine@catenacyber.fr"
+auto_ccs:
+  - "me+google@tomthorogood.co.uk"
+  - "p.antoine@catenacyber.fr"
 language: go
 fuzzing_engines:
-- libfuzzer
+  - libfuzzer
 sanitizers:
-- address
+  - address
+main_repo: "https://github.com/miekg/dns"