chore: run docs validation on all prs

The docs validation was restricted to prs with the docs directory was
changed, but this misses the primary usecase where the cli help was
updated without the corresponding docs page being updated.

Signed-off-by: Craig Jellick <[email protected]>

.github/workflows/validate-docs.yaml

@@ -1,13 +1,9 @@
 name: Validate docs build
 on:
   push:
-    paths:
-      - docs/**
     branches:
       - main
   pull_request:
-    paths:
-      - docs/**
     branches:
       - main
 
@@ -23,4 +19,4 @@ jobs:
           cache: false
           go-version: "1.22"
       - run: make init-docs
-      - run: make validate-docs
+      - run: make validate-docs