tools: bpftool: fix short option name for printing version in man pages

Manual pages would tell that option "-v" (lower case) would print the
version number for bpftool. This is wrong: the short name of the option
is "-V" (upper case). Fix the documentation accordingly.
Signed-off-by: NQuentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: NSong Liu <songliubraving@fb.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>

tools/bpf/bpftool/Documentation/bpftool-cgroup.rst

@@ -99,7 +99,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool-feature.rst

@@ -63,7 +63,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool-map.rst

@@ -135,7 +135,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool-net.rst

@@ -55,7 +55,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool-perf.rst

@@ -43,7 +43,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool-prog.rst

@@ -144,7 +144,7 @@ OPTIONS
 	-h, --help
 		  Print short generic help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json

tools/bpf/bpftool/Documentation/bpftool.rst

@@ -49,7 +49,7 @@ OPTIONS
 	-h, --help
 		  Print short help message (similar to **bpftool help**).
 
-	-v, --version
+	-V, --version
 		  Print version number (similar to **bpftool version**).
 
 	-j, --json