[chore] updated changelog for gen-ai (open-telemetry#1750)

Signed-off-by: Guangya Liu <[email protected]>

Author: gyliu513

.chloggen/1655.yaml

@@ -7,7 +7,7 @@
 change_type: enhancement
 
 # The name of the area of concern in the attributes-registry, (e.g. http, cloud, db)
-component: genai
+component: gen-ai
 
 # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
 note: |

.chloggen/1719.yaml

@@ -7,7 +7,7 @@
 change_type: enhancement
 
 # The name of the area of concern in the attributes-registry, (e.g. http, cloud, db)
-component: genai
+component: gen-ai
 
 # A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
 note: Adds `mistral_ai` as a `gen_ai.system` attribute value.