Bump bootstrap in /nbgrader/server_extensions/formgrader/static (#1974)

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 3.3.4 to 5.0.0.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v3.3.4...v5.0.0)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-version: 5.0.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

nbgrader/server_extensions/formgrader/static/package.json

@@ -23,7 +23,7 @@
   "dependencies": {
     "autosize": "^3.0.0",
     "backbone": "^1.1.2",
-    "bootstrap": "^3.3.0",
+    "bootstrap": "^5.0.0",
     "datatables.net": "^2.1.1",
     "datatables.net-bs": "^2.1.1",
     "jquery": "^3.5.1",
@@ -33,7 +33,7 @@
   "resolutions": {
     "autosize": "3.0.8",
     "backbone": "1.1.2",
-    "bootstrap": "3.3.4",
+    "bootstrap": "5.0.0",
     "datatables.net": "2.1.1",
     "datatables.net-bs": "2.1.1",
     "jquery": "3.5.1",

nbgrader/server_extensions/formgrader/static/yarn.lock

@@ -21,10 +21,12 @@ __metadata:
   languageName: node
   linkType: hard
 
-"bootstrap@npm:3.3.4":
-  version: 3.3.4
-  resolution: "bootstrap@npm:3.3.4"
-  checksum: ffb91ee0b335f600362b49442f8bee5365215c59170a1c5a876edea16ea07e245d01f0ebab878a1c6567c6e847e64713f5db660ee9b778d5ceb223328437f677
+"bootstrap@npm:5.0.0":
+  version: 5.0.0
+  resolution: "bootstrap@npm:5.0.0"
+  peerDependencies:
+    "@popperjs/core": ^2.9.2
+  checksum: 93c11f45fc990fa38e9c74bbba22e57c626eab7fba9c7fc4a3f8ba007e756597098a9990684877542d0a9407893cfe104e6e7fd39da2ebdd5133b4f94d03ea4d
   languageName: node
   linkType: hard
 
@@ -69,7 +71,7 @@ __metadata:
   dependencies:
     autosize: ^3.0.0
     backbone: ^1.1.2
-    bootstrap: ^3.3.0
+    bootstrap: ^5.0.0
     datatables.net: ^2.1.1
     datatables.net-bs: ^2.1.1
     jquery: ^3.5.1