Remove version specifier from brew swig logic (#1107)

Author: a-maurice

.github/workflows/build_android.yml

@@ -94,7 +94,7 @@ jobs:
           cd ..
           echo "NDK_ROOT=/tmp/android-ndk-r21e" >> $GITHUB_ENV
           echo "ANDROID_NDK_HOME=/tmp/android-ndk-r21e" >> $GITHUB_ENV
-          brew install swig@4.2
+          brew install swig
       
       - name: Force Java 8 (macOS)
         shell: bash

.github/workflows/build_ios.yml

@@ -77,7 +77,7 @@ jobs:
           cd firebase-cpp-sdk
           python scripts/gha/install_prereqs_desktop.py
           cd ..
-          brew install swig@4.2
+          brew install swig
 
       - name: Install python deps
         shell: bash

.github/workflows/build_macos.yml

@@ -81,7 +81,7 @@ jobs:
           cd firebase-cpp-sdk
           python scripts/gha/install_prereqs_desktop.py
           cd ..
-          brew install swig@4.2
+          brew install swig
 
       - name: Install python deps
         shell: bash

.github/workflows/build_tvos.yml

@@ -98,7 +98,7 @@ jobs:
           cd firebase-cpp-sdk
           python scripts/gha/install_prereqs_desktop.py
           cd ..
-          brew install swig@4.2
+          brew install swig
 
       - name: Install python deps
         shell: bash