chore: fix docs on Identify c bindings (#125)

Adds missing `context` parameter to docs on `LDClientSDK_Identify`.

Author: cwaldren-ld

libs/client-sdk/include/launchdarkly/client_side/bindings/c/sdk.h

@@ -181,7 +181,7 @@ LDClientSDK_Flush(LDClientSDK sdk, unsigned int reserved);
  * Example:
  * @code
  * bool identified_successfully;
- * if (LDClientSDK_Identify(client, 5000, &identified_successfully)) {
+ * if (LDClientSDK_Identify(client, context, 5000, &identified_successfully)) {
  *     // The client was able to re-initialize in less than 5 seconds.
  *     if (identified_successfully) {
  *         // Evaluations will use data for the new context.
@@ -199,7 +199,7 @@ value
  *
  * @code
  * // Returns immediately.
- * LDClientSDK_Identify(client, LD_NONBLOCKING, NULL);
+ * LDClientSDK_Identify(client, context, LD_NONBLOCKING, NULL);
  * @endcode
  *
  *