Spelling error typo fixing

Author: vijaydasmp

test/functional/test_framework/test_node.py

@@ -375,7 +375,7 @@ def test_success(cmd):
                 stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL) == 0
 
         if not sys.platform.startswith('linux'):
-            self.log.warning("Can't profile with perf; only availabe on Linux platforms")
+            self.log.warning("Can't profile with perf; only available on Linux platforms")
             return None
 
         if not test_success('which perf'):

test/lint/lint-shell.sh

@@ -61,7 +61,7 @@ if ! shellcheck "$EXCLUDE" $SOURCED_FILES $(git ls-files -- '*.sh' | grep -vE 's
 fi
 
 if ! command -v yq > /dev/null; then
-    echo "Skipping Gitian desriptor scripts checking since yq is not installed."
+    echo "Skipping Gitian descriptor scripts checking since yq is not installed."
     exit $EXIT_CODE
 fi