fix: replace mapfile with bash 3.2-compatible read loop in release-draft (#711)

macOS runners ship /bin/bash 3.2 which lacks the mapfile builtin
(introduced in bash 4.0), causing the "Update version in all podspecs"
step to fail with exit code 127.

Author: thomson-t

.github/workflows/release-draft.yml

@@ -69,11 +69,13 @@ jobs:
 
       - name: Update version in all podspecs
         run: |
-          mapfile -t PODSPECS < <(
-            echo "mParticle-Apple-SDK.podspec"
-            echo "mParticle-Apple-SDK-Swift/mParticle-Apple-SDK-Swift.podspec"
-            jq -r '.[] | select(.podspec) | .podspec' Kits/matrix.json
+          PODSPECS=(
+            "mParticle-Apple-SDK.podspec"
+            "mParticle-Apple-SDK-Swift/mParticle-Apple-SDK-Swift.podspec"
           )
+          while IFS= read -r spec; do
+            PODSPECS+=("$spec")
+          done < <(jq -r '.[] | select(.podspec) | .podspec' Kits/matrix.json)
           for podspec in "${PODSPECS[@]}"; do
             sed -i '' 's/\(s\.version[^=]*=[[:space:]]*\)"[^"]*"/\1"'"${VERSION}"'"/' "$podspec"
           done