[bootstrap] apply `shfmt` diffs (#7946)

diff --git a/bootstrap b/bootstrap
index 881f2c5..637c45c 100755
--- a/bootstrap
+++ b/bootstrap
@@ -39,7 +39,8 @@
 abs_srcdir=$(cd "$(dirname "${0}")" && pwd)
 
 # filter out knowning information from stderr which is causing GitHub annotation check warnings.
-(cd "$abs_srcdir" && exec "$abs_srcdir/$nlbuild_autotools_stem/scripts/bootstrap" -I "$abs_srcdir/$nlbuild_autotools_stem" "${@}") 2> \
-    >(grep -v "installing 'third_party/nlbuild-autotools/repo/third_party/autoconf/missing'" \
+(cd "$abs_srcdir" && exec "$abs_srcdir/$nlbuild_autotools_stem/scripts/bootstrap" -I "$abs_srcdir/$nlbuild_autotools_stem" "${@}") 2> >(
+    grep -v "installing 'third_party/nlbuild-autotools/repo/third_party/autoconf/missing'" \
         | grep -v "installing 'third_party/nlbuild-autotools/repo/third_party/autoconf/compile'" \
-        | grep -v "installing 'third_party/nlbuild-autotools/repo/third_party/autoconf/depcomp'" 1>&2)
+        | grep -v "installing 'third_party/nlbuild-autotools/repo/third_party/autoconf/depcomp'" 1>&2
+)