doc(README): improve table alignment

Author: rouson

README.md

@@ -69,9 +69,9 @@ summarizes the observed compiler behaviors:
 | AMD `flang`             | N.A. (see Note 1.) | 13.0.0 (AOCC_3.2.0-Build\#128 2021\_11\_12)       |
 | Cray `ftn`              | >= 3 (see Note 2.) | 13.0.1                                            |
 | GCC `gfortran` :trophy: | 0                  | 13.1.0                                            |
-| IBM  `xlf2008_r`        | 1                  | 17.1.0 on AIX                                     |
+| IBM `xlf2008_r`         | 1                  | 17.1.0 on AIX                                     |
 | Intel `ifort`           | 1                  | 2021.7.0 Build 20220726_000000                    |
-|       `ifx`             | 1                  | 2024.0.0 Build 20231017                           |
+| Intel `ifx`             | 1                  | 2024.0.0 Build 20231017                           |
 | LLVM `flang` :trophy:   | 0                  | `git` commit `f5253058144aca1e9fcacd` (9/20/2022) |
 | NAG `nagfor` :trophy:   | 0                  | 7.1 Build 7113                                    |
 | NVIDIA `nvfortran`      | 2                  |  22.7-0                                           |