Improve JDK's and sbt's setup process in test.yml

[yutaro-sakamoto]

Open-COBOL-ESQL-4j/.github/workflows/test.yml

Lines 73 to 85 in aff07da

	# Setup JDK
	- name: Setup JDK
	uses: actions/setup-java@v4
	with:
	distribution: zulu
	java-version: 21
	# Setup JDK
	- name: Setup JDK
	uses: actions/setup-java@v4
	with:
	distribution: zulu
	java-version: 11

The above code should be improved. For instance,

Open-COBOL-ESQL-4j/.github/workflows/coverage.yml

Lines 44 to 55 in aff07da

	# Setup JDK
	- name: Setup JDK
	uses: actions/setup-java@v4
	with:
	distribution: zulu
	java-version: 21
	# Setup sbt
	- name: Setup sbt
	run: |
	curl -fL https://github.com/coursier/coursier/releases/latest/download/cs-x86_64-pc-linux.gz | gzip -d > cs && chmod +x cs && echo Y | ./cs setup
	echo PATH="$PATH:/home/runner/.local/share/coursier/bin" >> "$GITHUB_ENV"