discontinue `linux_armv7l` master builds

Authored by: bashonly

.github/workflows/build.yml

@@ -579,6 +579,7 @@ jobs:
           lockV2 yt-dlp/yt-dlp-master-builds 2024.10.22.060347 (?!\w+_exe).+ Python 3\.8
           lockV2 yt-dlp/yt-dlp-master-builds 2024.10.22.060347 win(?:_x86)?_exe Python 3\.[78].+ Windows-(?:7-|2008ServerR2)
           lockV2 yt-dlp/yt-dlp-master-builds 2025.09.01.000000 darwin_legacy_exe .+
+          lockV2 yt-dlp/yt-dlp-master-builds 2025.09.01.000000 linux_armv7l_exe .+
           EOF
 
       - name: Sign checksum files

.github/workflows/release.yml

@@ -226,6 +226,7 @@ jobs:
       version: ${{ needs.prepare.outputs.version }}
       channel: ${{ needs.prepare.outputs.channel }}
       origin: ${{ needs.prepare.outputs.target_repo }}
+      linux_armv7l: ${{ inputs.source != 'master' }}  # Skip for 'master' channel (push) releases
     permissions:
       contents: read
       packages: write  # For package cache