Fix macOS CI (#11359)

Update mbedtls to 2.28.5

.github/workflows/main.yml

@@ -616,7 +616,7 @@ jobs:
         env:
           # For compatibility with macOS 10.13
           ZLIB_VERSION: 1.3
-          MBEDTLS_VERSION: 2.25.0
+          MBEDTLS_VERSION: 2.28.5
           PCRE2_VERSION: 10.42
         run: |
           set -ex

extra/github-actions/build-mac.yml

@@ -2,7 +2,7 @@
   env:
     # For compatibility with macOS 10.13
     ZLIB_VERSION: 1.3
-    MBEDTLS_VERSION: 2.25.0
+    MBEDTLS_VERSION: 2.28.5
     PCRE2_VERSION: 10.42
   run: |
     set -ex