Bump github/super-linter from 3.15.5 to 4.0.2 (Chia-Network#6209)

* Bump github/super-linter from 3.15.5 to 4.0.2

Bumps [github/super-linter](https://github.com/github/super-linter) from 3.15.5 to 4.0.2.
- [Release notes](https://github.com/github/super-linter/releases)
- [Commits](github/super-linter@v3.15.5...v4.0.2)

Signed-off-by: dependabot[bot] <[email protected]>

* install.sh line 96:
if [ x"$INSTALL_PYTHON_VERSION" = x ]; then
     ^------------------------^ SC2268: Avoid x-prefix in comparisons as 
it no longer serves a purpose.

Did you mean: 
if [ "$INSTALL_PYTHON_VERSION" = "" ]; then

For more information:
  https://www.shellcheck.net/wiki/SC2268

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Gene Hoffman <[email protected]>

.github/workflows/super-linter.yml

@@ -48,7 +48,7 @@ jobs:
       # Run Linter against code base #
       ################################
       - name: Lint Code Base
-        uses: github/super-linter@v3.15.5
+        uses: github/super-linter@v4.0.2
 #        uses: docker://github/super-linter:v3.10.2
         env:
           VALIDATE_ALL_CODEBASE: true

install.sh

@@ -84,7 +84,7 @@ find_python() {
 	unset BEST_VERSION
 	for V in 37 3.7 38 3.8 39 3.9 3; do
 		if which python$V >/dev/null; then
-			if [ x"$BEST_VERSION" = x ]; then
+			if [ "$BEST_VERSION" = "" ]; then
 				BEST_VERSION=$V
 			fi
 		fi
@@ -93,7 +93,7 @@ find_python() {
 	set -e
 }
 
-if [ x"$INSTALL_PYTHON_VERSION" = x ]; then
+if [ "$INSTALL_PYTHON_VERSION" = "" ]; then
 	INSTALL_PYTHON_VERSION=$(find_python)
 fi