chore: add Go package names to spellcheck dictionary

Author: stefanoamorelli

.cspell.json

@@ -8,7 +8,8 @@
     ".cspell/**",
     ".gemini/**",
     ".vscode/**",
-    ".cspell.json"
+    ".cspell.json",
+    "**/go.sum"
   ],
   "dictionaryDefinitions": [
     {

.cspell/custom-words.txt

@@ -135,3 +135,28 @@ XVCJ
 Yapily
 Zalopay
 Zalora
+cncf
+davecgh
+envoyproxy
+felixge
+genproto
+glog
+gopkg
+groupcache
+honnef
+httpsnoop
+logr
+longrunning
+objx
+opentelemetry
+otelgrpc
+otelhttp
+pmezard
+prometheus
+protoc
+RPCURL
+stdr
+stretchr
+udpa
+unmarshal
+xerrors