chore 📦: Update CI/CD workflow to export GCC compiler path

- Updated CI/CD workflow to export path variable in GitHub environment variables for easier access to temporary GCC compiler.

.gitea/workflows/ci.yml

@@ -47,8 +47,8 @@ jobs:
             echo "MSP430 GCC not found!"
             exit 1
           fi
-          echo "export PATH=/tmp/msp430-gcc-9.3.1.11_linux64/bin:$PATH" >> ~/.bashrc
-          source ~/.bashrc
+          echo "export PATH=/tmp/msp430-gcc-9.3.1.11_linux64/bin:$PATH" >> $GITHUB_ENV
+          echo $PATH
 
       - name: Check if msp430-elf-gcc is available
         run: |