Update Linguist languages.yml to latest upstream

Author: github-actions[bot]

config/languages.yml

@@ -6057,6 +6057,7 @@ Protocol Buffer Text Format:
   - ".textproto"
   - ".pbt"
   - ".pbtxt"
+  - ".txtpb"
   tm_scope: source.textproto
   ace_mode: text
   language_id: 436568854
@@ -8685,6 +8686,7 @@ XML:
   - ".grxml"
   - ".gst"
   - ".hzp"
+  - ".icls"
   - ".iml"
   - ".ivy"
   - ".jelly"