Surround secrets value with double quotes when checking if they are provided.

This is needed to avoid some unexpected behaviors when the variable contains spaces, newline, or special characters.

PiperOrigin-RevId: 784274585

Author: jDramaix

.github/workflows/release_common.yaml

@@ -62,10 +62,10 @@ jobs:
               exit 1
             fi
           }
-          check_secret "SONATYPE_USERNAME_TOKEN" ${{ secrets.SONATYPE_USERNAME_TOKEN }}
-          check_secret "SONATYPE_PASSWORD_TOKEN" ${{ secrets.SONATYPE_PASSWORD_TOKEN }}
-          check_secret "MAVEN_GPG_PRIVATE_KEY" ${{ secrets.MAVEN_GPG_PRIVATE_KEY }}
-          check_secret "MAVEN_GPG_PASSPHRASE" ${{ secrets.MAVEN_GPG_PASSPHRASE }}
+          check_secret "SONATYPE_USERNAME_TOKEN" "${{ secrets.SONATYPE_USERNAME_TOKEN }}"
+          check_secret "SONATYPE_PASSWORD_TOKEN" "${{ secrets.SONATYPE_PASSWORD_TOKEN }}"
+          check_secret "MAVEN_GPG_PRIVATE_KEY" "${{ secrets.MAVEN_GPG_PRIVATE_KEY }}"
+          check_secret "MAVEN_GPG_PASSPHRASE" "${{ secrets.MAVEN_GPG_PASSPHRASE }}"
       - name: Checkout current commit
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2