Fix scripts for shellcheck 0.8 (#11051)

* Fix scripts for shellcheck 0.8

* Updates needed for hugo and shell check

* Ignore hugo build lock

.gitignore

@@ -1,3 +1,6 @@
+# hugo artifacts
+.hugo_build.lock
+
 # Eclipse artifacts
 .project
 .pydevproject
@@ -34,4 +37,4 @@ out/**
 go/**
 
 # archived site version
-archived_version
+archived_version

config.toml

@@ -274,4 +274,8 @@ disableAliases = true
     weight = 5
 
 [permalinks]
-  case-studies = "/:slug"
+  case-studies = "/:slug"
+
+[security]
+  [security.funcs]
+    getenv = ['^HUGO_','URL']

scripts/lint_site.sh

@@ -107,7 +107,7 @@ SKIP_LANGS=( en zh pt-br )
 for lang in $LANGS; do
     for i in "${!SKIP_LANGS[@]}"; do
        if [[ "${SKIP_LANGS[$i]}" = "${lang}" ]]; then
-           unset SKIP_LANGS["${i}"]
+           unset 'SKIP_LANGS[${i}]'
        fi
     done
     SKIP_LANGS=( "${SKIP_LANGS[@]}" )