GH Actions/label new PRs: tweak label criteria

Only mark a PR as touching one of the standards when the sniff/docs files are touched. Test changes can also relate to the Tokenizer or other parts of PHPCS, so don't necessarily mean that the PR should be marked with the standard name.

.github/labeler.yml

@@ -45,35 +45,35 @@ labels:
   - label: "Standard: Generic"
     draft: false
     files:
-      - "src/Standards/Generic/.*"
+      - "src/Standards/Generic/(Docs|Sniffs)/.*"
   - label: "Standard: MySource"
     draft: false
     files:
-      - "src/Standards/MySource/.*"
+      - "src/Standards/MySource/(Docs|Sniffs)/.*"
   - label: "Standard: PEAR"
     draft: false
     files:
-      - "src/Standards/PEAR/.*"
+      - "src/Standards/PEAR/(Docs|Sniffs)/.*"
   - label: "Standard: PSR1"
     draft: false
     files:
-      - "src/Standards/PSR1/.*"
+      - "src/Standards/PSR1/(Docs|Sniffs)/.*"
   - label: "Standard: PSR2"
     draft: false
     files:
-      - "src/Standards/PSR2/.*"
+      - "src/Standards/PSR2/(Docs|Sniffs)/.*"
   - label: "Standard: PSR12"
     draft: false
     files:
-      - "src/Standards/PSR12/.*"
+      - "src/Standards/PSR12/(Docs|Sniffs)/.*"
   - label: "Standard: Squiz"
     draft: false
     files:
-      - "src/Standards/Squiz/.*"
+      - "src/Standards/Squiz/(Docs|Sniffs)/.*"
   - label: "Standard: Zend"
     draft: false
     files:
-      - "src/Standards/Zend/.*"
+      - "src/Standards/Zend/(Docs|Sniffs)/.*"
 
   - label: "Type: breaking change"
     draft: false