flake.lock: Updating 'org (emacs-straight/org-mode)' - 5b300edf -> f81ba451 (#420)

### Changes for org

On branch: main
Commits: 5b300edf2e...f81ba451a7

- [96072266](9607226610) org-export--prune-tree: Ensure spaces when removing objects
- [8f058060](8f058060ce) * doc/org-manual.org: Clarify "++" explanation for habits
- [7c8623be](7c8623be96) fixup! * doc/org-manual.org: Clarify "++" explanation for habits
- [07508fb0](07508fb097) org-assert-version: Skip version check when Org is a part of Emacs
- [f1fd1f22](f1fd1f22f4) Update version number for the 9.6.4 release
- [f4446ce7](f4446ce795) ox-icalendar: Apply folding to whole VCALENDAR
- [a8a95b6c](a8a95b6c2c) * lisp/org-agenda.el: Do not modify string constant " "
- [0f6ae729](0f6ae7296e) org-agenda-dim-blocked-tasks: Fix when the value is 'invisible
- [62996300](62996300ef) org-manual.org: Clarify the ox-md uses the original markdown spec
- [c827341d](c827341dfb) org-cite-activate: Ensure that we keep the correct match-data
- [7d8a9324](7d8a9324f8) org-babel-js-function-wrapper: Fix when the last line is a comment
- [ab85c1b9](ab85c1b958) org-fold: Allow customizing commands where invisible edits are checked
- [cfe5e01e](cfe5e01e14) org-lint: Add checker for $...$ LaTeX fragments
- [26ef5e3e](26ef5e3e5b) org-src: Use `sh-mode' for all the shells it can handle
- [2ebc5186](2ebc518675) * lisp/ob-R.el: Fix ESS compatibility
- [4929f0c5](4929f0c55f) * lisp/ob-R.el: Fix ESS compatibility
- [83e446ea](83e446ea86) * testing/lisp/test-ob-R.el: Fix test failures with the newest ESS
- [3c449cc4](3c449cc438) * testing/lisp/test-ob-R.el (ob-session-R-result-value): New test
- [264d555e](264d555e4b) org-org-publish-to-org: Handle fixme
- [27ee55eb](27ee55ebfd) ox-latex: Fix << and >> in verbatim and code markup
- [f81ba451](f81ba451a7) Prefer "backend" over "back-end"

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

flake.lock

@@ -263,11 +263,11 @@
     "org": {
       "flake": false,
       "locked": {
-        "lastModified": 1681369745,
-        "narHash": "sha256-DVYNfiVfr+mRolhnO8SOlpdd8rhZlejKKbcCCUGP2UI=",
+        "lastModified": 1681992679,
+        "narHash": "sha256-3hFZxDgP8/x6O/1wnfJGaieQPO5Py9+G36FgSoPH+JM=",
         "owner": "emacs-straight",
         "repo": "org-mode",
-        "rev": "5b300edf2e44f70af8e1f32dd18f1c784122eacc",
+        "rev": "f81ba451a793febd8c734422c4081badbf9ad17f",
         "type": "github"
       },
       "original": {