Fix typo in gcc rule attribute sdk_version documentation (#32)

Signed-off-by: Nikola Radakovic <nikola.ra.radakovic@bmw.de>

Author: nradakovic

rules/gcc.bzl

@@ -227,7 +227,7 @@ gcc_toolchain = repository_rule(
         "license_info_value": attr.string(doc = "License info value (custom settings)"),
         "license_info_variable": attr.string(doc = "License info variable name (custom settings)"),
         "license_path": attr.string(doc = "Lincese path"),
-        "sdk_version": attr.string(doc = "SDP version string"),
+        "sdk_version": attr.string(doc = "SDK version string"),
         "sdp_version": attr.string(doc = "SDP version string"),
         "tc_cpu": attr.string(doc = "Target platform CPU."),
         "tc_identifier": attr.string(doc = "Constraint to be used for toolchain definition (e.g. gcc_12.2.0)."),