Fix compile error after knowhere change prometheus header path (#24434)

Signed-off-by: NCongqi Xia <congqi.xia@zilliz.com>

internal/core/src/segcore/metrics_c.cpp

@@ -11,7 +11,7 @@
 
 #include <string>
 
-#include "knowhere/comp/prometheus_client.h"
+#include "knowhere/prometheus_client.h"
 #include "segcore/metrics_c.h"
 
 char*

internal/core/thirdparty/knowhere/CMakeLists.txt

@@ -11,7 +11,7 @@
 # or implied. See the License for the specific language governing permissions and limitations under the License.
 #-------------------------------------------------------------------------------
 
-set( KNOWHERE_VERSION 6af98f6 )
+set( KNOWHERE_VERSION 77e8606 )
 
 message(STATUS "Building knowhere-${KNOWHERE_SOURCE_VER} from source")
 message(STATUS ${CMAKE_BUILD_TYPE})