message: objc: Update documentation with new config API.
  GitOrigin-RevId:
diff: @@ -72,16 +72,15 @@ Tink provides customizable initialization, which allows for choosing specific
  implementations (identified by _key types_) of desired primitives. This
  initialization happens via _registration_ of the implementations.
  -For example, if you want to use all implementations of all primitives in Tink
  -1.1.0, the initialization would look as follows:
  +For example, if you want to use all implementations of all primitives in the
  +current version of Tink, the initialization would look as follows:
  ```objc
  #import "Tink/TINKAllConfig.h"
  #import "Tink/TINKConfig.h"
  - #import "Tink/TINKVersion.h"
  NSError *error = nil;
  - TINKAllConfig *config = [[TINKAllConfig alloc] initWithVersion:TINKVersion1_1_0 error:&error];
  + TINKAllConfig *config = [[TINKAllConfig alloc] initWithError:&error];
  if (!config || error) {
  // handle error.
  }
  @@ -96,11 +95,9 @@ To use only implementations of the AEAD primitive:
  ```objc
  #import "Tink/TINKAeadConfig.h"
  #import "Tink/TINKConfig.h"
  - #import "Tink/TINKVersion.h"
  NSError *error = nil;
  - TINKAeadConfig *aeadConfig = [[TINKAeadConfig alloc] initWithVersion:TINKVersion1_1_0
  - error:&error];
  + TINKAeadConfig *aeadConfig = [[TINKAeadConfig alloc] initWithError:&error];
  if (!aeadConfig || error) {
  // handle error.
  }
  