ci: skip docker-publish when no new version is released #715

Job	Run time
postgresql 17 build + test	1m 24s
postgresql 15 build + test	1m 28s
postgresql17-macos-x86_64 build	30s
postgresql17-macos-arm64 build	39s
postgresql15-linux-arm64 build	41s
postgresql15-linux-x86_64 build	31s
postgresql17-linux-arm64 build	47s
postgresql15-macos-x86_64 build	24s
postgresql15-macos-arm64 build	28s
postgresql17-linux-x86_64 build	30s
macos build + test	2m 44s
macos-x86_64 build	1m 37s
linux-musl-arm64 build + test	4m 33s
linux-musl-x86_64 build + test	1m 51s
android-x86_64 build + test	8m 24s
linux-arm64 build + test	5m 15s
ios build	1m 47s
android-aar build	7m 43s
macos-arm64 build + test	2m 50s
android-arm64-v8a build	2m 18s
ios-sim build	1m 34s
apple-xcframework build	4m 7s
linux-x86_64 build + test	1m 37s
windows-x86_64 build + test	7m 25s
android-armeabi-v7a build	2m 11s
release	22s
docker ${{ matrix.image }} pg${{ matrix.pg_major }}	0s
	1h 3m 40s

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