fix: Prevent word splitting in compilation scripts when handling paths (#1502)

These invocations will all cause bugs when pwd returns something that
 can be interpreted by bash, the most common case being a folder
 with whitespaces in its name. In other words these can be triggered by
 calling the scripts from any folder that contains whitespaces.

 More info on this specific finding by shellcheck:
 https://github.com/koalaman/shellcheck/wiki/SC2046

.github/workflows/linux_cpn.yml

@@ -48,7 +48,7 @@ jobs:
         shell: bash
         run: |
           mkdir output && \
-          tools/build-companion-nightly.sh $(pwd) $(pwd)/output/
+          tools/build-companion-nightly.sh "$(pwd)" "$(pwd)/output/"
 
       - name: Compose release filename
         # https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions

.github/workflows/macosx_cpn.yml

@@ -92,7 +92,7 @@ jobs:
         shell: bash
         run: |
           mkdir output && \
-          tools/build-companion-nightly.sh $(pwd) $(pwd)/output/
+          tools/build-companion-nightly.sh "$(pwd)" "$(pwd)/output/"
 
       - name: Compose release filename
         # https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions

.github/workflows/win-cpn-32.yml

@@ -91,7 +91,7 @@ jobs:
         run: |
           mkdir output && \
           CMAKE_PREFIX_PATH=$RUNNER_WORKSPACE/Qt/$QT_VERSION/$MINGW_PATH \
-          tools/build-companion-nightly-win32.sh $(pwd) $(pwd)/output/
+          tools/build-companion-nightly-win32.sh "$(pwd)" "$(pwd)/output/"
       - name: Compose release filename
         # https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions
         run: echo "artifact_name=edgetx-cpn-win-32-${GITHUB_REF##*/}" >> $GITHUB_ENV

.github/workflows/win_cpn.yml

@@ -94,7 +94,7 @@ jobs:
         run: |
           mkdir output && \
           CMAKE_PREFIX_PATH=$RUNNER_WORKSPACE/Qt/$QT_VERSION/$MINGW_PATH \
-          tools/build-companion-nightly.sh $(pwd) $(pwd)/output/
+          tools/build-companion-nightly.sh "$(pwd)" "$(pwd)/output/"
 
       - name: Compose release filename
         # https://stackoverflow.com/questions/58033366/how-to-get-current-branch-within-github-actions