bpf: fix typo in header for bpf_perf_prog_read_value

Fix a simple typo in the documentation for bpf_perf_prog_read_value.
Signed-off-by: Florian Lehner <dev@der-flo.net>
Acked-by: John Fastabend <john.fastabend@gmail.com>
Link: https://lore.kernel.org/r/20230203121439.25884-1-dev@der-flo.netSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

include/uapi/linux/bpf.h

@@ -2801,7 +2801,7 @@ union bpf_attr {
  *
  * long bpf_perf_prog_read_value(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, u32 buf_size)
  * 	Description
- * 		For en eBPF program attached to a perf event, retrieve the
+ * 		For an eBPF program attached to a perf event, retrieve the
  * 		value of the event counter associated to *ctx* and store it in
  * 		the structure pointed by *buf* and of size *buf_size*. Enabled
  * 		and running times are also stored in the structure (see

tools/include/uapi/linux/bpf.h

@@ -2801,7 +2801,7 @@ union bpf_attr {
  *
  * long bpf_perf_prog_read_value(struct bpf_perf_event_data *ctx, struct bpf_perf_event_value *buf, u32 buf_size)
  * 	Description
- * 		For en eBPF program attached to a perf event, retrieve the
+ * 		For an eBPF program attached to a perf event, retrieve the
  * 		value of the event counter associated to *ctx* and store it in
  * 		the structure pointed by *buf* and of size *buf_size*. Enabled
  * 		and running times are also stored in the structure (see