geoip2-filter: Correct filter name in example (fluent#2100)

Signed-off-by: DoumanAsh <[email protected]>

Author: DoumanAsh

pipeline/filters/geoip2-filter.md

@@ -32,7 +32,7 @@ pipeline:
       dummy: {"remote_addr": "8.8.8.8"}
 
   filters:
-    - name: gioip2
+    - name: geoip2
       match: '*'
       database: GioLite2-City.mmdb
       lookup_key: remote_addr
@@ -79,4 +79,4 @@ By running Fluent Bit with this configuration, you will see the following output
 
 ```text
 {"remote_addr": "8.8.8.8", "country": "United States", "isocode": "US"}
-```
+```