samples/bpf: Fix typos in README

This change fixes some typos found in the BPF samples README file.
Signed-off-by: Daniel Müller <deso@posteo.net>
Acked-by: David Vernet <void@manifault.com>
Link: https://lore.kernel.org/r/20221018163231.1926462-1-deso@posteo.netSigned-off-by: Martin KaFai Lau <martin.lau@kernel.org>

samples/bpf/README.rst

@@ -37,8 +37,8 @@ user, simply call::
 
  make headers_install
 
-This will creates a local "usr/include" directory in the git/build top
-level directory, that the make system automatically pickup first.
+This will create a local "usr/include" directory in the git/build top
+level directory, that the make system will automatically pick up first.
 
 Compiling
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