feat: make the update bindings script PWD agnostic

Author: GuillaumeLagrange

crates/codspeed/src/instrument_hooks/update-bindings.sh

@@ -1,8 +1,10 @@
 #!/usr/bin/env bash
 set -euo pipefail
 
-bindgen ../../instrument-hooks/includes/core.h \
-  -o bindings.rs \
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+bindgen "$SCRIPT_DIR/../../instrument-hooks/includes/core.h" \
+  -o "$SCRIPT_DIR/bindings.rs" \
   --rust-target 1.74 \
   --allowlist-function "instrument_hooks_.*" \
   --allowlist-var "MARKER_TYPE_.*"