The type of rhyme used by William Butler Yeats in his poem "The Municipal Gallery Revisited" (1937) is called slant rhyme.
The rhyme pattern changes throughout the poem and does not follow a strict scheme, so it cannot be strict rhyme. Besides, there is not internal rhyme as words don't rhyme within the same line.
It cannot be double rhyme as well, because that would require the last word in each line to have the same vowel sound in the second-to-last syllable and the following sounds, but in the case of this poem, those words are all monosyllabic.
The correct answer is slant rhyme, also known s imperfect rhyme, which describes a rhyme in which there is a similar but not equal correspondence of sounds shared by two words.