Bug 27179: Misspelling of Method in REST API files

Bug 27179: Misspelling of Method in REST API files

Test Plan:
1. Run "git grep -i mehtod" (which should return 2 files)
2. Apply patch
3. Rerun grep command (should return no files)

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit a22b3bb504b0a9a77aa9ce3e9f326cc71fcf8d96)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 252564ebd74bef4a0f6c902b82ecb902c8905986)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
(cherry picked from commit 1653117d2044c0c507be5eb0190a172efbec87e1)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>