Fix GitHub Actions on Windows (#1533)

The [actions
fail](https://github.com/hazelcast/hazelcast-nodejs-client/actions/runs/14506740078/job/40704373693)
because the `java-config.env` isn't parsed correctly.

Specifically, we are using the _default_ shell (on Windows, `pwsh`),
which doesn't work with `cat` - we should be specifying `bash`
explicitly (even on Windows) as per the C++ repo:

https://github.com/hazelcast/hazelcast-cpp-client/blob/0659bebcca6f8d001ef9abb11077f7431fb39bbd/.github/actions/build-test/windows/action.yml#L53-L55

[Example Windows execution showing that it succeeded in setting the Java
version with this
change](https://github.com/hazelcast/hazelcast-nodejs-client/actions/runs/14509405447/job/40704693730)
(other test failures out of scope).

Author: JackPGreen

.github/workflows/code_sample_checker.yml

@@ -14,6 +14,7 @@ jobs:
             - name: Checkout code
               uses: actions/checkout@v4
             - name: Read Java Config
+              shell: bash
               run: cat .github/java-config.env >> $GITHUB_ENV
             - name: Setup Java
               uses: actions/setup-java@v4

.github/workflows/coverage_runner.yml

@@ -55,6 +55,7 @@ jobs:
               ref: refs/pull/${{ github.event.inputs.pr_number }}/merge
 
           - name: Read Java Config
+            shell: bash
             run: cat .github/java-config.env >> $GITHUB_ENV
           - name: Setup Java
             uses: actions/setup-java@v4

.github/workflows/nightly_runner_master.yml

@@ -16,6 +16,7 @@ jobs:
             - name: Checkout code
               uses: actions/checkout@v4
             - name: Read Java Config
+              shell: bash
               run: cat .github/java-config.env >> $GITHUB_ENV
             - name: Setup Java
               uses: actions/setup-java@v4