Update Drone CI signature.

.drone.yml

@@ -5,19 +5,19 @@ name: scan-build
 steps:
     - name: bootstrap
       image: signalwire/freeswitch-public-base:stretch
-      pull: true
+      pull: always
       commands:
       - ./autogen.sh
 
     - name: configure
       image: signalwire/freeswitch-public-base:stretch
-      pull: true
+      pull: always
       commands:
       - ./configure --with-pic --without-doxygen --disable-stun
 
     - name: scan-build
       image: signalwire/freeswitch-public-base:stretch
-      pull: true
+      pull: always
       commands:
       - mkdir -p scan-build
       - echo '#!/bin/bash\nscan-build-4.0 -o ./scan-build/ make -j`nproc --all` |& tee ./scan-build-result.txt\nexitstatus=$${PIPESTATUS[0]}\necho $$exitstatus > ./scan-build-status.txt\n' > scan.sh
@@ -28,7 +28,7 @@ steps:
 
     - name: notify
       image: signalwire/drone-notify
-      pull: true
+      pull: always
       environment:
         SLACK_WEBHOOK_URL:
           from_secret: slack_webhook_url
@@ -46,6 +46,6 @@ trigger:
 
 ---
 kind: signature
-hmac: 70f5ed51150cb1841953ba5df4e5a3cd860af6dd28a733d1c24011aec783c9fe
+hmac: ac8a02442523f785e8d9eef2a667e664b3bd5ec12b858dcc6736518ea18ff266
 
 ...