Ignore docs changes for yb-ctl GH action (yugabyte#7388)

Ignore docs changes for yb-ctl workflow

Summary: Ignore docs paths for some GH checks. 
* Can't have both a paths and a paths-ignore entry. Changing to negative syntax for the docs path to be ignored.

Co-authored-by: Alex Ball <aball@yugabyte.com>

.github/workflows/yb-ctl-test.yml

@@ -8,13 +8,15 @@ on:
       - master
     paths:
       - '**/yb-ctl*'
+      - '!docs/**'
 
   pull_request:
     branches:
       - master
     paths:
       - '**/yb-ctl*'
-
+      - '!docs/**'
+
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   yb-ctl-test: