Exclude test pr from restricted testing

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Change-Id: I945d2a35565263a631b7121e855deb353ca59afe
diff --git a/mbed-tls-restricted-pr.yaml b/mbed-tls-restricted-pr.yaml
index d89b557..80e8042 100644
--- a/mbed-tls-restricted-pr.yaml
+++ b/mbed-tls-restricted-pr.yaml
@@ -37,7 +37,7 @@
         discover-pr-forks-strategy: both
         discover-pr-forks-trust: permission
         discover-pr-origin: both
-        head-filter-regex: '(?!^PR-(758|759|850|906|916|919)-(merge|head)$)(PR-\d+-(merge|head))'
+        head-filter-regex: '(?!^PR-(758|759|806|850|906|916|919)-(merge|head)$)(PR-\d+-(merge|head))'
         status-checks:
           skip: true
           skip-branch-source-notifications: true