minor tweaks to 4.8.1 release notes

RELEASE_NOTES

@@ -13,25 +13,23 @@ update/bugfix release
   - add end-to-end test for running EasyBuild in different Linux distros using containers (#3968)
   - suggest default title in `--review-pr` (#4287)
   - add `build_and_install_loop` hooks to run before and after the install loop for individual easyconfigs (#4304)
-  - Implement hooks for failure scenarios: `crash_hook`, `cancel_hook`, `fail_hook` (#4315)
+  - implement support for `cancel_hook` and `fail_hook` (#4315, #4325)
   - add postiter hook to the list of steps so the corresponding hook can be used (#4316)
   - add `run_shell_cmd` hook (#4323)
   - add `build_info_msg` easyconfig parameter to print message during installation of an easyconfig (#4324)
   - add `--silence-hook-trigger` configuration option to supress printing of debug message every time a hook is triggered (#4329)
   - add support for using fine grained Github tokens (#4332)
   - add definitions for ifbf and iofbf toolchain (#4337)
-  - add support for submodule filtering and specifying extra Git configuration in `git_config` (#4338)
+  - add support for submodule filtering and specifying extra Git configuration in `git_config` (#4338, #4339)
 - various bug fixes, including:
-  - Improve error when checksum dict has no entry for a file (#4150)
-  - don't fail in `mkdir` if path gets created while processing it (#4300)
-  - Ignore request for external module (meta)data when no modules tool is active (#4308)
-  - use sys.executable to obtain path to `python` command, rather than assuming that `python` command is available in `$PATH` (#4309)
+  - improve error when checksum dict has no entry for a file (#4150)
+  - avoid error being logged when `checksums.json` is not found (#4261)
+  - don't fail in `mkdir` if path gets created while processing it (#4300, #4328)
+  - ignore request for external module (meta)data when no modules tool is active (#4308)
+  - use sys.executable to obtain path to `python` command in tests, rather than assuming that `python` command is available in `$PATH` (#4309)
   - fix `test_add_and_remove_module_path` by replacing string comparison of paths by checking whether they point to the same path (since symlinks may cause trouble) (#4312)
   - enhance `Toolchain.get_flag` to handle lists (#4319)
-  - remove crash hook (since it doesn't work) (#4325)
-  - don't use `FileExistsError` in `mkdir` function (doesn't exist in Python 2.7) (#4328)
   - only add extensions in module file if there are extensions (#4331)
-  - Fix submodule filtering bug in `git_config` (#4339)
 
 
 v4.8.0 (7 July 2023)