fix(default-config): must-accept-rule on browsers only

TIL docker clients don't include the Accept header all the time. I would
have thought they did that. Oops.

Closes: #1346
Signed-off-by: Xe Iaso <me@xeiaso.net>

data/botPolicies.yaml

@@ -134,7 +134,10 @@ bots:
       adjust: -5
 
   - name: should-have-accept
-    expression: '!("Accept" in headers)'
+    expression:
+      all:
+        - userAgent.contains("Mozilla")
+        - '!("Accept" in headers)'
     action: WEIGH
     weight:
       adjust: 5

data/meta/default-config.yaml

@@ -118,7 +118,10 @@
     adjust: -5
 
 - name: should-have-accept
-  expression: '!("Accept" in headers)'
+  expression:
+    all:
+      - userAgent.contains("Mozilla")
+      - '!("Accept" in headers)'
   action: WEIGH
   weight:
     adjust: 5