Added a symlink to the Docker image from /bin/sh -> /bin/bash (#15294)

* Added a symlink to the Docker image from /bin/sh -> /bin/bash

* Added changelog fragment

---------

Co-authored-by: Preston Van Loon <preston@pvl.dev>

changelog/symlink.md

@@ -0,0 +1,3 @@
+### Added
+
+- Added /bin/sh simlink to docker images

tools/prysm_image.bzl

@@ -17,6 +17,15 @@ def prysm_image_upload(
         extension = "tar.gz",
     )
 
+    pkg_tar(
+        name = "sh_symlink_tar",
+        symlinks = {
+            "bin/sh": "/bin/bash",
+        },
+        tags = tags,
+        extension = "tar.gz",
+    )
+
     oci_image(
         name = "oci_image",
         base = "@linux_debian11_multiarch_base",
@@ -43,6 +52,7 @@ def prysm_image_upload(
             "@arm64_debian11_libpcre2",
           ],
         }) + [
+            ":sh_symlink_tar",
             ":binary_tar",
         ],
         labels = {