Bump tar from 6.2.0 to 6.2.1 (cylc#1750)

Author: dependabot[bot]

yarn.lock

@@ -9858,16 +9858,16 @@ __metadata:
   linkType: hard
 
 "tar@npm:^6.1.11, tar@npm:^6.1.2":
-  version: 6.2.0
-  resolution: "tar@npm:6.2.0"
+  version: 6.2.1
+  resolution: "tar@npm:6.2.1"
   dependencies:
     chownr: "npm:^2.0.0"
     fs-minipass: "npm:^2.0.0"
     minipass: "npm:^5.0.0"
     minizlib: "npm:^2.1.1"
     mkdirp: "npm:^1.0.3"
     yallist: "npm:^4.0.0"
-  checksum: 10c0/02ca064a1a6b4521fef88c07d389ac0936730091f8c02d30ea60d472e0378768e870769ab9e986d87807bfee5654359cf29ff4372746cc65e30cbddc352660d8
+  checksum: 10c0/a5eca3eb50bc11552d453488344e6507156b9193efd7635e98e867fab275d527af53d8866e2370cd09dfe74378a18111622ace35af6a608e5223a7d27fe99537
   languageName: node
   linkType: hard