Configure bump to detect only minor libwebp updates (#296)

Author: rob93c

.github/workflows/bump.yaml

@@ -3,7 +3,7 @@ name: Bump CI
 on:
   workflow_dispatch:
   schedule:
-    - cron: '0 10 * * *'
+    - cron: '0 8 * * *'
 
 jobs:
   bump:

Dockerfile

@@ -1,6 +1,6 @@
 FROM eclipse-temurin AS builder
 
-# bump: libwebp /LIBWEBP_VERSION=([\d.]+)/ git:https://chromium.googlesource.com/webm/libwebp.git|*
+# bump: libwebp /LIBWEBP_VERSION=([\d.]+)/ git:https://chromium.googlesource.com/webm/libwebp.git|^1
 # bump: libwebp after ./hashupdate Dockerfile LIBWEBP $LATEST
 ARG LIBWEBP_VERSION=1.4.0
 ARG LIBWEBP_URL="https://storage.googleapis.com/downloads.webmproject.org/releases/webp/libwebp-$LIBWEBP_VERSION-linux-x86-64.tar.gz"