ci: update ffmpeg version

Author: slhck

.github/workflows/claude-code-review.yml

@@ -8,7 +8,7 @@ on:
     #   - "src/**/*.py"
 
 env:
-  FFMPEG_VERSION: "7.1"
+  FFMPEG_VERSION: "8.0"
 
 jobs:
   claude-review:

.github/workflows/claude.yml

@@ -11,7 +11,7 @@ on:
     types: [submitted]
 
 env:
-  FFMPEG_VERSION: "7.1"
+  FFMPEG_VERSION: "8.0"
 
 jobs:
   claude:

.github/workflows/python-package.yml

@@ -9,7 +9,7 @@ on:
     branches: [ master ]
 
 env:
-  FFMPEG_VERSION: "7.1"
+  FFMPEG_VERSION: "8.0"
 
 jobs:
   build: