tree-wide: spellcheck using codespell

Fixes #15436.

src/basic/fs-util.h

@@ -82,7 +82,7 @@ enum {
         CHASE_SAFE        = 1 << 3, /* Return EPERM if we ever traverse from unprivileged to privileged files or directories */
         CHASE_TRAIL_SLASH = 1 << 4, /* Any trailing slash will be preserved */
         CHASE_STEP        = 1 << 5, /* Just execute a single step of the normalization */
-        CHASE_NOFOLLOW    = 1 << 6, /* Do not follow the path's right-most compontent. With ret_fd, when the path's
+        CHASE_NOFOLLOW    = 1 << 6, /* Do not follow the path's right-most component. With ret_fd, when the path's
                                      * right-most component refers to symlink, return O_PATH fd of the symlink. */
         CHASE_WARN        = 1 << 7, /* Emit an appropriate warning when an error is encountered */
 };

src/basic/unit-def.h

@@ -7,7 +7,7 @@
 
 /* The enum order is used to order unit jobs in the job queue
  * when other criteria (cpu weight, nice level) are identical.
- * In this case service units have the hightest priority. */
+ * In this case service units have the highest priority. */
 typedef enum UnitType {
         UNIT_SERVICE = 0,
         UNIT_MOUNT,